TY  - BOOK
ED  - Royal Irrigation Department
TI  - Soil survey and land classification of the Yom Basin : Maps
U1  - RID. 627.52 
PY  - 1970///
CY  - Bangkok
PB  - Royal Irrigation Department
N1  - 1. Location map
2. Phrae area : Semi detailed soil map
3. Phrae area : Semi detailed land class map
4. Sukhothai area north : Semi detailed soil map
5. Sukhothai area central : Semi detailed soil map
6. Sukhothai area south : Semi detailed soil map
7. Sukhothai area north : Semi detailed land class map
8. Sukhothai area central : Semi detailed land class map
9. Sukhothai area south : Semi detailed land class map
10. Detail study area : Detailed soil map
11. Detail study area : Detailed land class map
12. Pha Khor area : Land Assessment unit map
ER  -