Plants, people, and environment / [edited by] Peter B. Kaufman, J. Donald LaCroix. Kaufman, Peter B. ed. LaCroix, Joseph Donald, 1925 ed. Botany. Human ecology. Ecology. Conservation of natural resources. QK47 .P63 581.52 KAP Includes index. Glossary: p. 518-532. New York : Macmillan, c1979. c1979. 1979 Text xii, 542 p. : eng