Ewusie, J. Yanney Elements of tropical ecology : with reference to the African, Asian, Pacific, and New World tropics / - London Heinemann Educational Books, 1980. - xiv, 205 p. : ill. (maps) ; 25 cm. Includes index. ISBN: 0435937006 LC Class. No.: QH541.5.T7 / .Ewu8 1980