Plants and the ecosystem /
Billings, W. D.
Plants and the ecosystem / W. D. Billings. - 3d ed. - Belmont, Calif. : Wadsworth Pub. Co., c1978. - viii, 177 p. : ill. ;
Second ed. published in 1970 under title: Plants, man, and the ecosystem. Includes index.
0534005713
Plant ecology.
QK901 / .B5 1978
Plants and the ecosystem / W. D. Billings. - 3d ed. - Belmont, Calif. : Wadsworth Pub. Co., c1978. - viii, 177 p. : ill. ;
Second ed. published in 1970 under title: Plants, man, and the ecosystem. Includes index.
0534005713
Plant ecology.
QK901 / .B5 1978