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Conventional map signs, British and French.

APA Citation

Geological Survey (U.S.). (1918). Conventional map signs, British and French. Jan. 1918. [Washington]: Printed by U.S. Geological Survey.

Geological Survey (U.S.). Conventional Map Signs, British And French. Jan. 1918. [Washington]: Printed by U.S. Geological Survey, 1918.

Warning: These citations may not always be complete (especially for serials).