TY  - BOOK
AU  - Sparks, Donald L.,ed
TI  - Advances in agronomy vol. 81
U1  - 631 P4.81 
PY  - 2004///
CY  - Amsterdam
PB  - Academic Press
KW  - Edited  Donald L. Sparks
KW  - Advances,Agronomy
ER  -