TY  - BOOK
TI  - Transition from extensive to intensive agriculture with fertilizers: proceedings of the VIIth colloquium of the International Potash Institute held in Israel 1969
AV  - HD1405 T73 
PY  - 1969///
CY  - Berne
PB  - International Potash Institute
KW  - Fertilizers
KW  - Congresses
ER  -