Economics of watershed planning /
edited by G. S. Tolley and F. E. Riggs.
- Lowa : The lowa state university press, c 1961.
- ix, 339 p. : ill. ; 23 cm.
Includes index.
336 336
Water resources development.
333.91 / J579e
Includes index.
336 336
Water resources development.
333.91 / J579e