Ludwigson, John.
Resources: used and abused.
- [New York : United Nations, 1972]
- Man's home .
Cover title. "UN sales number 72.I.5." "Prepared with the cooperation of the Secretariat of the United Nations Conference on the Human Environment."
73170831
Natural resources.
Man -- Influence on nature.--Man -- Influence on nature.
Conservation of natural resources.
HC55 / .L75
333.7