TY  - BOOK
AU  - W SHEMILT
TI  - PROCEEDING OF SYMPOSIUM ON MAXIMUM YIELD RESEARCH
U1  - P631.57P847P 
PY  - 1990///
PB  - INTERNATIONAL CONGRESS OF SOIL SCIENCE
KW  - PROCEEDING OF SYMPOSIUM ON MAXIMUM YIELD RESEARCH
N1  - GIFT
ER  -