Plants, man, and the ecosystem /
Billings, W. D. 1910-
Plants, man, and the ecosystem / W. D. Billings. - 2d ed. - California : Wadsworth, c1970. - x, 160 p. : ill., maps. - Fundamentals of botany series .
First ed. published under title: Plants and the ecosystem.
0333146336
Plant ecology.
Environmental sciences
Plants, man, and the ecosystem / W. D. Billings. - 2d ed. - California : Wadsworth, c1970. - x, 160 p. : ill., maps. - Fundamentals of botany series .
First ed. published under title: Plants and the ecosystem.
0333146336
Plant ecology.
Environmental sciences