Bautista, E. R. B. (1974). Chemical characteristics of the waters of the Pampanga River and the Laguna de Bay as factors influencing their suitability for irrigation [microform]. Photoduplication Service, University of the Philippines Library.
Citace podle Chicago (17th ed.)Bautista, Eumelia R. B. Chemical Characteristics of the Waters of the Pampanga River and the Laguna De Bay as Factors Influencing Their Suitability for Irrigation [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.
Citace podle MLA (9th ed.)Bautista, Eumelia R. B. Chemical Characteristics of the Waters of the Pampanga River and the Laguna De Bay as Factors Influencing Their Suitability for Irrigation [microform]. Photoduplication Service, University of the Philippines Library, 1974.