1950
Shell Oil Company
1:1m
1900
1:20k
1920
1984
EROS Data Center
1:125k
1870
Froiseth, B.A.M.
1885
1:250k
1903
Sanchez, A.M.
1:63k
1908
U.S. Geological Survey
1876
King, Clarence
1:253k