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- [4] SOME ESTIMATES OF THE PRICE ELASTICITY OF DEMAND FOR PHOSPHATIC AND NITROGENOUS FERTILIZERS AUSTRALIAN JOURNAL OF AGRICULTURAL ECONOMICS, 1987, 31 (01): : 65 - 73
- [5] PHOSPHATIC FERTILIZERS PROPERTIES AND PROCESSES ERDOL UND KOHLE ERDGAS PETROCHEMIE, 1965, 18 (07): : 576 - +
- [6] FLUORIDE ANALYSIS OF PHOSPHATIC FERTILIZERS NEW ZEALAND JOURNAL OF SCIENCE, 1971, 14 (04): : 851 - +
- [10] PROGRAM OF SUPPLYING THE AGRICULTURE WITH PHOSPHATIC FERTILIZERS PRZEMYSL CHEMICZNY, 1979, 58 (08): : 400 - 402