TY  - BOOK
AU  - Colloguium of the International Potash Institute, 15th, Wage
TI  - Physiological aspects of crop productivity: Proceedings
U1  - 631.5 C51P 
PY  - 1980///
CY  - Bern
PB  - International Potash Institute
KW  - AGRICULTURAL PRODUCTIVITY -- CONGRESSES
KW  - CROP YIELDS -- CONGRESSES
KW  - PLANT - BREEDING -- CONGRESSES
ER  -