Plants and the ecosystem /
Billings, W. D. (William Dwight), 1910-,
Plants and the ecosystem / by W. D. Billings. - London : MacMillan, 1964. - iv, 154 pages: illustrations ; 22 cm.
Bibliography: p. 147-148.
Botany--Ecology.
Plants and the ecosystem / by W. D. Billings. - London : MacMillan, 1964. - iv, 154 pages: illustrations ; 22 cm.
Bibliography: p. 147-148.
Botany--Ecology.
