Christiansen, Freddy B., Theories of populations in biological communities / F.B. Christiansen, T.M. Fenchel. - Berlin : Springer-Verlag, 1977. - x, 144 p. : - Ecological studies ; v. 20 . Includes index. ISBN: 0387080104 Subjects--Topical Terms: Biotic communities. Dewey Class. No.: 577.82 / Th