Philippine Islands. Executive Bureau. (1977). Annual report of the executive secretary [microform]. Photoduplication Service, University of the Philippines Library.
Chicago-referens (17:e uppl.)Philippine Islands. Executive Bureau. Annual Report of the Executive Secretary [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
MLA-referens (9:e uppl.)Philippine Islands. Executive Bureau. Annual Report of the Executive Secretary [microform]. Photoduplication Service, University of the Philippines Library, 1977.
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