Philippines. National Census and Statistics Office. (1970). Listing of establishments: Distribution of all establishments by economic activity and geographic area. NCSO.
Chicago-referens (17:e uppl.)Philippines. National Census and Statistics Office. Listing of Establishments: Distribution of All Establishments by Economic Activity and Geographic Area. Manila: NCSO, 1970.
MLA-referens (9:e uppl.)Philippines. National Census and Statistics Office. Listing of Establishments: Distribution of All Establishments by Economic Activity and Geographic Area. NCSO, 1970.
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