1790. Irvine, William, 1741-1804. Photostats of original manuscript map done approximately 1795 located in the Pennsylvania State Archives.; Part of "RG - 17 6/5"; Includes legend.;...
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1795. Irvine, William, 1741-1804. Photostats of original manuscript map done approximately 1795 located in the Pennsylvania State Archives.; Part of "RG - 17 6/2"; Includes legend.;...
1795. Irvine, William, 1741-1804. Photostats of original manuscript map done approximately 1795 located in the Pennsylvania State Archives.; Includes legend.; Relief shown by shadin...
1981. United States. Soil Conservation Service. Shows land use.; "December 1981."; Includes vicinity map. 98 x 126 centimeters 1:50,000. The Service (Harrisburg, Pa.?).
1980. United States. Soil Conservation Service. Shows land use.; "September 1980."; Includes vicinity map. 129 x 102 centimeters 1:50,000. The Service (Harrisburg, Pa.).
1982. United States. Soil Conservation Service. Shows land use.; "January 1982." 109 x 68 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1983. United States. Soil Conservation Service. Shows land use.; "January 1983."; Includes location map. 91 x 112 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1983. United States. Soil Conservation Service. Shows land use.; "February 1983."; Includes location map. 122 x 95 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.?).
1983. United States. Soil Conservation Service. Shows land use.; "February 1983."; Includes location map.; "Sheet 2 of 2." 112 x 91 centimeters Scale 1:50,000. The Service (Harrisburg, Pa.).
1982. United States. Soil Conservation Service. "Interpretations derived from soil survey sheets completed 1979 by Soil Conservation Service, USDA, of Valley County, Montana."; "August 1982 BASE ... The Service (Fort Worth, Tex.).