TY  - BOOK
TI  - Soil science society of America proceedings.
U1  - P 630.2 SOI 1970 
PY  - 1971///
CY  - Madison, Wis.
PB  - Soil Science Society of America
KW  - Soil Science Society of America
KW  - Soil Periodicals
KW  - United States
ER  -