TY  - BOOK
AU  - Troeh Frederick R Au.
AU  -  Thompson Louis M Au.
TI  - Soils and soil fertility
SN  - 081380955X
U1  - U672(J:1), P5 
PY  - 2005///
CY  - Iowa
PB  - Blackwell Pub.         
KW  - Geography
N1  - Bibliography chapterwise; Glossary P 441-468; Appendix P 437-439
ER  -