Civilian Conservation Corps (U.S.). Company 1640. Twin Hill billy. Company 1640.
Chicago Style (17th ed.) CitationCivilian Conservation Corps (U.S.). Company 1640. Twin Hill Billy. Port Angeles, Wash.: Company 1640.
MLA (8th ed.) CitationCivilian Conservation Corps (U.S.). Company 1640. Twin Hill Billy. Company 1640.
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