TY  - BOOK
AU  - Kovda, V. A.
ED  - International congress of soil science
TI  - Problems of soil science
PY  - 1981///
CY  - M.
PB  - Nauka
KW  - Москва
KW  - П03я431(0)
KW  - rubbk
N2  - Библиогр. в конце докл
ER  -