TY  - BOOK
AU  - PALMER,  Robert G
AU  - TROEH, Frederick R
TI  - Introductory soil science laboratory manual
U1  - 631.4 
PY  - 1977///
CY  - Iowa
PB  - Iowa State University
KW  - Soil biology
KW  - Soil chemistry
KW  - Soil testing
ER  -