Big Spring 1954/1984 (ver. 2)
PDF (18.4 MB)
USGS - Historic Quads
Big Spring 1954/1976 (ver. 1)
PDF (14.2 MB)
Big Spring 1954/1967 (ver. 1)
PDF (15.4 MB)
Big Spring 1954/1965 (ver. 1)
PDF (16.8 MB)
Big Spring 1958 (ver. 1)
PDF (17.6 MB)