TY  - BOOK
AU  - "Novak, B., et al�, Eds."
TI  - Studies about Humus : Transactions of the international symposium
U1  - "631.417.2(100)""1975.8.18/22""(082.2)   L5" 
PY  - 0000///Praha
CY  - 1975
PB  - Inst. Of Plant Nutrition
ER  -