Phosphorus Requirments for Sustainable Agriulture in Asia and oceania ; Proceedings of A Symposuim 6 - 10 March 1989

Phosphorus Requirments for Sustainable Agriulture in Asia and oceania ; Proceedings of A Symposuim 6 - 10 March 1989 IRRI Manila; - Manila IRRI 1990 - xiii 478pp
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