Grengia, E. M. (1979). Soil-cement: Its structural characteristics and suitability as a low-cost housing material [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-referens (17:e uppl.)Grengia, Epifanio M. Soil-cement: Its Structural Characteristics and Suitability as a Low-cost Housing Material [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1979.
MLA-referens (9:e uppl.)Grengia, Epifanio M. Soil-cement: Its Structural Characteristics and Suitability as a Low-cost Housing Material [microform]. Photoduplication Service. University of the Philippines Library, 1979.
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