"Delaware County Institute of Science (Delaware County, Pa.)" . . "Natural history." . . . . "Delaware County (Pa.)" . . "History of Delaware County, Pennsylvania"@en . . . . . . . . "History of Delaware County, Pennsylvania from the discovery of the territory included within its limit to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds, written under the direction and appointment of the Delaware County Institute of Science"@en . . . . "Electronic books"@en . . . . . . "History of Delaware County, Pennsylvania, from the discovery of the territory included within its limits, to the present time. With a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds. Written under the direction ... of the Delaware County Institute of Science. (Appendix.)"@en . "History of Delaware County Pennsylvania - 1862"@en . . "History" . "History"@en . "Biography"@en . . "History of Delaware County, Pennsylvania from the discovery of the territory included within its limits to the present time, with a notice of the geology of the country, and catalogues of its minerals, plants, quadrupeds, and birds"@en . . . . "History of Delaware County, Pennsylvania from the discovery of the territory included within its limits to the present time : with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds"@en . . "History of Delaware County, Pennsylvania : from the discovery of the territory included within its limits to the present time ; with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds"@en . . . . . "History of Delaware County, Pennsylvania from the discovery of the territory included within its limits to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds, written under the direction and appointment of the Delaware County Institute of Science"@en . "History of Delaware County, Pennsylvania : from the discovery of the territory included within its limit to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds, written under the direction and appointment of the Delaware County Institute of Science"@en . "Genealogy"@en . "History of Delaware county, Pennsylvania from the discovery of the territory included within its limit to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds"@en . "History of Delaware County, Pennsylvania : from the discovery of the territory included within its limits to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds"@en . . "History of Delaware County, Pennsylvania, from the discovery of the territory included within its limits to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds"@en . "History of Delaware County, Pennsylvania, from the discovery of the territory included within its limits to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds" . . "History of Delaware County, Pennsylvania from the discovery of the territory included within its limits to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds"@en . . . . . . . . . "History of Delaware County, Pennsylvania from the discovery of the territory included within its limits to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds"@en . "History of Delaware county, Pennsylvania : from the discovery of the territory included within its limits to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds, written under the direction ... of the Delaware county institute of science"@en . . . "History of Delaware County, Pennsylvania : from the discovery of the territory included within its limits to the present time ; with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds /cG. Smith" . . . . "History of Delaware County, Pennsylvania, from the discovery of the territory included within its limit to the present time, with a notice of the geology of the county, and catalogues of its minerals, plants, quadrupeds, and birds, written under the direction and appointment of the Delaware County Institute of Science" . . . . "History of Delaware County, Pennsylvania : from the discovery of the territory included within its limits to the present time, with a notice to the geology of the county, and catalogues of its minerals, plants, quadrupeds and birds"@en . . "History of Delaware County, Pennsylvania : from the discovery of the territory included within its limits to the present time, with a notice of the geology of the country, and catalogues of its minerals, plants, quadrupeds, and birds"@en . . . "Delaware County Institute of Science (Pennsylvania)" . . "Delaware County Institute of Science (Media, Pa.)" . . "Delaware county institute of science, Media, Pa." . "Delaware County Institute of Science, Media, Pa." . "Pennsylvania" . . "United States, Pennsylvania, Delaware" . . "Natural history Pennsylvania Delaware County." . . "GenealogyCD.com." . .