De Bell, G. (1970). The environmental handbook: Prepared for the first national environmental teach-in. New York: Ballantine Books.
Παραπομπή Chicago StyleDe Bell, Garrett. The Environmental Handbook: Prepared for the First National Environmental Teach-in. New York: Ballantine Books, 1970.
Παραπομπή MLADe Bell, Garrett. The Environmental Handbook: Prepared for the First National Environmental Teach-in. New York: Ballantine Books, 1970.
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