Vereinigte Staaten von Nordamerika [Sheet 3], map, [1850..1863]; (https://texashistory.unt.edu/ark:/67531/metapth190388/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Vereinigte Staaten von Nordamerika [Sheet 3], map, [1850..1863]; (https://texashistory.unt.edu/ark:/67531/metapth190388/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .