TY  - BOOK
AU  - International Potash Institute(pub.)
TI  - Development of K-fertilizer recommendations : 22nd Colloquium of the International Potash Institute, Soligorsk, USSR, June 18-23, 1990.
U1  - 631.83 
PY  - 1990///
CY  - Bern, Switzerland : 
PB  - International Potash Institute
ER  -