TY  - BOOK
AU  - SANCHEZ, Pedro A
TI  - Properties and managment of soils in the tropics
U1  - 631.491 3 S13P 
PY  - 1976///
CY  - New York
PB  - John Wiley And Sons.
KW  - SOILS -- TROPICS
KW  - AGRICULTURE
KW  - PLANT -- SOIL RELATIONSHIP
KW  - SOIL SCIENCE
ER  -