Abdul Aziz Bidin, Phosphate in Malaysian ultisols and oxisols as evaluated by a mechanistic model (microform) / Abdul Aziz Bidin. - Ann Arbor, Mich. : University Microfilms International , 1983. - 2 microfiches ; 11 x 15 cm. Thesis (Ph.D.)-Purdue University, 1982 Subjects--Topical Terms: Soils--Phosphorus content.