A manual of conservation of soil and water
United States Department of Agriculture
A manual of conservation of soil and water - New Delhi Oxford and IBH Publishing 1964 - iv, 208p. 22 cm.
Roman
Soil conservation-Manual
Water conservation - Manual
631.45
A manual of conservation of soil and water - New Delhi Oxford and IBH Publishing 1964 - iv, 208p. 22 cm.
Roman
Soil conservation-Manual
Water conservation - Manual
631.45