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Detail SNI
  1. SNI 02-1760-1990,Pupuk amonium sulfat
  1. SNI 19-0428-1998 Petunjuk pengambilan contoh padatan
  1. ISO 3332: 1975
  2. Official Methods of Analysis AOAC International, 17 th Edition, Volume 1, 2000, Agricultural Chemicals, Contaminants, Drugs. Chapter 2 - Fertilizers
  3. ISO 2993: 1974
  1. AWWA Standard for Ammonium Sulfate, American National Standard, 1987.