. . . . . . . . . . . "Preliminary report to the ... Governor"@en . . . . . . . . . . "Preliminary report, Pennsylvania State Planning Board" . "Preliminary report, Pennsylvania State Planning Board"@en . . "Preliminary report, Pennsylvania State Planning Board, to the Hon. Gifford Pinchot, Governor of the Commonwealth, and to the National Resources Board"@en . . . . . . . "Preliminary report"@en . . . "Pennsylvania" . .