TY  - BOOK
AU  - Burkett, Charles William.
TI  - Soils: : their properties, improvement, management and the problems of crop growing and crop feeding
U1  - 631.4 
PY  - 1912///
CY  - New York
PB  - Orange Judd
KW  - Suelos y cultivos
KW  - Suelos
ER  -