TY  - BOOK
AU  - Colloquium of the International Potash Institute, 16th, Wars
TI  - Agricultural yield potentials in Continental eltimates: Proceedings
U1  - 631.558 C51A 
PY  - 1981///
CY  - Bern
PB  - International Potash Institute
KW  - CROP YIELDS -- CONGRESSES
KW  - AGRICULTURAL PRODUCTIVITY -- CONGRESSES
ER  -