Soil survey manual
- Newdelhi, Oxford & IBH publishing company 1966
- 489
- Bureau of plant industry, soils and agricultural engineering, U S D A
- 18 V S department agriculture hand book .
Soil survey-manual/soil classification/soil mapping
631.477 3 SOI
100
Soil survey-manual/soil classification/soil mapping
631.477 3 SOI
100