TY  - BOOK
AU  - Walsh, Leo M.
AU  - Beaton, James D.
TI  - Soil testing and plant analysis
U1  - 631.42 
PY  - 1973///
CY  - Madison, Wisconsin
PB  - Soil Science Society of America
KW  - Química vegetal
KW  - Suelos
KW  - Análisis
ER  -