Altoona, PA
Topography
1:62500
C.H. Birdseye, Frank Sutton, J.I. Gayetty, W.S. Beames, F.M. Schilling, E.L. McNair, A.H. Thompson, J.L. Lenovitz
MAP144A-4
US Geological Survey
1920
Huntingdon, Hollidaysburg, Cresson, Tyrone, Coalport, Irvona, Philipsburg, Houtzdale
158
Altoona, PA
Topography
1:24000
US Geological Survey, Pennsylvania Department of Conservation and Natural Resources
MAP144A-11
US Geological Survey
1962
14
Altoona, PA
Topography
1:62500
C.H. Birdseye, Frank Sutton, J.I. Gayetty, W.S. Beames, F.M. Schilling, E.L. McNair, A.H. Thompson, J.L. Lenovitz
MAP144A-4
US Geological Survey
Huntingdon, Hollidaysburg, Cresson, Tyrone, Coalport, Irvona, Philipsburg, Houtzdale
158
Altoona, PA
Topography
1:24000
US Geological Survey, Pennsylvania Department of Conservation and Natural Resources
MAP144A-11
US Geological Survey
14