Bixby, David W Phosphatic fertilizers properties and processes: A study of technological, economic and agronomic considerations - England: The Sulphur Institue, 1964 - 64p. - Technical bulletin 8 . Subjects--Topical Terms: Agriculture Subjects--Index Terms: Sulphuric Sulphate method Universal Decimal Class. No.: 631.8:661.632 / K4