Principles of plant nutrition. 4 Ed - Konrad Mengel; Ernest A. Kirkby (New Delhi Paima Publishing Corporation, 1987)
Konrad Mengel & Ernest A. Kirkby: Principles of plant nutrition. 4 Ed. (4th Ed) New Delhi. Paima Publishing Corporation, 1987. 81-86535-12-8--(581.13MEN)
ENGLISH