United States. Bureau of the Census. 1977 census of construction industries: Industry series, water, sewer, pipe line, communication and power line construction contractors, SIC 1623.
Chicago Style (17th ed.) CitationUnited States. Bureau of the Census. 1977 Census of Construction Industries: Industry Series, Water, Sewer, Pipe Line, Communication and Power Line Construction Contractors, SIC 1623.
MLA (9th ed.) CitationUnited States. Bureau of the Census. 1977 Census of Construction Industries: Industry Series, Water, Sewer, Pipe Line, Communication and Power Line Construction Contractors, SIC 1623.
Warning: These citations may not always be 100% accurate.