Freeland, P. W. Habitats and the environment / Peter Freeland. - London : Hodder and Stoughton, 1991. - viii,119p : ill., graphs,diagrams ; 27 cm. - Focus on biology . ISBN: 034053267X : £8.99 9780340532676 Nat. Bib. No.: GB9206542 bnb Subjects--Index Terms: Ecology