TY  - BOOK
AU  - Zehler, E and others,
TI  - IPI Research topics No.9 Potassium Sulphate & Potassium Chloride
U1  - 631.83 
PY  - 1981///
CY  - Bern
PB  - International Potash Institute
KW  - Techniques, equipment & materials
ER  -