TY  - BOOK
AU  - PAUL, E.A.
TI  - Soil organic matter in temperate agroecosystems ; long-term experiments in North America
U1  - 631.417 097 S60 
PY  - 1997///
PB  - Boca Raton
KW  - HUMUS -- NORTH AMERICA
KW  - SOIL ECOLOGY -- NORTH AMERICA
ER  -