Conservation networks,
Leopold, Luna B. 1915-2006.
Conservation networks, by Luna B. Leopold. - Washington, 1962- - v. illus. 27 cm.
pt.A. The man and the hill.--pt.B. A national network of hydrologic bench marks.
gs 62000242
Hydrology--Research.
Nature--Effect of human beings on.
Water conservation.
QE75 / .C5 no. 460 A, etc.
Conservation networks, by Luna B. Leopold. - Washington, 1962- - v. illus. 27 cm.
pt.A. The man and the hill.--pt.B. A national network of hydrologic bench marks.
gs 62000242
Hydrology--Research.
Nature--Effect of human beings on.
Water conservation.
QE75 / .C5 no. 460 A, etc.