Principles of resources conservation policy ; with some applications to soil and water resources
Principles of resources conservation policy ; with some applications to soil and water resources
- Washington : NAS, 1961
- 50 p. ; gráfs.
- NAS. Publication ; 885 .
- NAS. Publication ; 885 .
30208
Recursos naturales--Conservación.
30208
Recursos naturales--Conservación.
