Philippine (Commonwealth) Bureau of the Census and Statistics. (1976). Handbook of Philippine statistics [microform]. Photoduplication Service, University of the Phil ppines Library.
Chicago-referens (17:e uppl.)Philippine (Commonwealth) Bureau of the Census and Statistics. Handbook of Philippine Statistics [microform]. Quezon City: Photoduplication Service, University of the Phil ppines Library, 1976.
MLA-referens (9:e uppl.)Philippine (Commonwealth) Bureau of the Census and Statistics. Handbook of Philippine Statistics [microform]. Photoduplication Service, University of the Phil ppines Library, 1976.
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