Water resources planning and social goals: conceptualization toward a new methodology.

The economics of soil erosion in the Philippines av Intia, Hermes M.

The last days of mankind ecological survival or extinction av Mines, Samuel

Perspectives on resource management av O'Riordan, Timothy

The everglades today endangered wilderness av Sand, George X., 1915-

Decade of decision report on the Conservation Society's conference 'Conservation 1970s'

Natural resource conservation an ecological approach av Owen, Oliver S. 1920-

Table of contents only

Pollution the land we live on av Jones, Claire

Elementary soil and water engineering

Nature study for conservation a handbook for environmental education av Brainerd, John W. 1918-

Table of contents only