TY  - BOOK
AU  - Mengel, Konrad 
AU  - Kirkby, Ernest A. 
TI  - Principles of plant nutrition
U1  - 581.13 22
PY  - 1978///
CY  - Switzerland
PB  - International Potash Institute
KW  - botany
KW  - plant nutrition
N1  - include index
ER  -