State Geology map room; employees creating geologic maps.

Chicago citation style
State Geology map room; employees creating geologic maps.. 1942 January 13. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/3058. (Accessed November 13, 2019.)
APA citation style
(1942 January 13) State Geology map room; employees creating geologic maps.. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/3058
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/3058>.
Note: These citations are programmatically generated and may be incomplete.