Dyfyniad APA

Geological Survey (U.S.). Reclamation Service. (1907). Specifications. The Service.

Dyfyniad Arddull Chicago

Geological Survey (U.S.). Reclamation Service. Specifications. Washington, D.C.: The Service, 1907.

Dyfyniad MLA

Geological Survey (U.S.). Reclamation Service. Specifications. The Service, 1907.

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