United States. Bureau of the Census. (1964). Providencia: A case study in economic censuses. s.n.
Chicago Style (17th ed.) CitationUnited States. Bureau of the Census. Providencia: A Case Study in Economic Censuses. [Washington: s.n, 1964.
MLA (9th ed.) CitationUnited States. Bureau of the Census. Providencia: A Case Study in Economic Censuses. s.n, 1964.
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