Maxino, G. (1975). An experimental study of the radiometric determination of potassium content of soils and minerals [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-referens (17:e uppl.)Maxino, Gerardo. An Experimental Study of the Radiometric Determination of Potassium Content of Soils and Minerals [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1975.
MLA-referens (9:e uppl.)Maxino, Gerardo. An Experimental Study of the Radiometric Determination of Potassium Content of Soils and Minerals [microform]. Photoduplication Service. University of the Philippines Library, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.