TY  - BOOK
AU  - 
AU  - Kirkby,Ernest A.
AU  - Mengel, Konrad, Jt. Author
TI  - Principles of plant nutrition
SN  - 3906535037
PY  - 1987///
CY  - Worblaufen-Bern
PB  - International Potash Institute
KW  - Plant nutrition
ER  -