Cite

Del Norte and San Juan / E. Steinbach, Dep. U.S. Min. Surveyor.

MLA

Steinbach, E. Del Norte and San Juan / E. Steinbach, Dep. U.S. Min. Surveyor. s.n., 1875. https://collections.library.yale.edu/catalog/15818457.

APA, 6th edition

Steinbach, E. (1875). Del Norte and San Juan / E. Steinbach, Dep. U.S. Min. Surveyor. [Maps]. s.n., https://collections.library.yale.edu/catalog/15818457.