Environment and plant ecology / John R. Etherington ; with a contributed chapter by W. Armstrong. Etherington, John R. Plant ecology. QK901 .E85 1982 581.52 19 ETE Includes index. Bibliography: p. 426-476. Chichester ; New York : Wiley, c1982. c1982. 1982 Text xxii, 487 p. : eng