Austin County / lithographed by August Gast & Co.'s new process.
MLA
Austin County / Lithographed by August Gast & Co.'s New Process. s.n., 1880. https://collections.library.yale.edu/catalog/15811518.
APA, 6th edition
Austin County / lithographed by August Gast & Co.'s new process. (1880). [Maps]. s.n., https://collections.library.yale.edu/catalog/15811518.