Revised Standard Soil color charts
"Oyama, M. & Takehara, H."
Revised Standard Soil color charts - 1970 "Research Council fo Agriculture, Forestry & fisheries" Japan - 80
631.43(084) L0
Revised Standard Soil color charts - 1970 "Research Council fo Agriculture, Forestry & fisheries" Japan - 80
631.43(084) L0


