TY  - BOOK
AU  - Flaig, W
AU  - Nagar, B
ED  - Food and Agriculture Organization of the United Nations (Rome)
TI  - Organic materials and soil productivity: soil resources development and conservation service land and water development division
U1  - 631.4 21st
PY  - 1977///
CY  - Rome
PB  - FAO
KW  - Soil productivity; Soil fertility
ER  -