Geology of the forty-ninth parallel sheet no. 12, map 85 A Side: 1 of 2
Reference the current side of this Map.
Geology of the forty-ninth parallel sheet no. 12, map 85 A, map, 1913; [Ottawa, Ontario, Canada]. (texashistory.unt.edu/ark:/67531/metapth187406/m1/1/: accessed January 15, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting University of Texas at Arlington Library.