"Geophysics." . . . . "Aeromagnetik." . . "Geophysics Maine Penobscot County." . . "From 230 to 570 million years ago" . . "Geophysics Maine Aroostook County." . . "Geology." . . "Geological Survey (U.S.)," . . "Geology Maine Penobscot County." . . . . "Geological-geophysical investigations of bedrock in the Island Fall quadrangle, Aroostook and Penobscot Counties, Maine"@en . . . . . . "Geological-geophysical investigations of bedrock in the Island Falls quadrangle, Aroostook and Penobscot Counties, Maine : description of the stratigraphy and structure of lower Palezoic rocks in the Island Falls quadrangle and the results of using geophysical techniques to trace certain strata beneath covered areas" . . . . . "Geological-geophysical investigations of bedrock in the Island Falls quadrangle, Aroostock and Penobscot Counties, Maine" . . . . . . . . . "Geological geophysical investigations of bedrock in the Island Falls quadrangle Aroostook and Penobscot Counties Maine"@en . . . . "Geological-geophysical investigations of bedrock in the Island Falls quadrangle, Aroostook and Penobscot Counties, Maine" . . . . . . . . "Island Falls quadrangle, Aroostook and Penobscot Counties, Maine"@en . . . "Additional title page description: Description of the stratigraphy and structure of lower Paleozoic rocks in the Island Falls quadrangle and the results of using geophysical techniques to trace certain strata beneath covered areas."@en . . "Geological-geophysical investigations of bedrock in the Island Falls Quadrangle, Aroostook and Penobscot Counties, Maine : description of the stratigraphy and structure of lower Paleozoic rocks"@en . . . . . . . "Geological-geophysical investigations of bedrock in the Islans Falls quadrangle, Aroostook and Penobscot Counties, Maine" . "Maine" . . "Geology Maine Aroostook County." . . "Aroostook (Maine)" . . "Geologische Kartierung." . .