TY  - BOOK
AU  - Gray,Leyton
AU  - De Leon,Hector M.
TI  - Soil science: nature and properties of soil 
SN  - 9781682868089
AV  - S 591  .G791 2019
PY  - 2019///]
CY  - New York
PB  - Syrawood Publishing
KW  - Soil science
KW  - Philippines
ER  -