Ecological biology : for A-level and intermediate students in Africa - Ewer, D. W.; Hall, J. B. (John Bartholomew), 1932-; Clerk, G. C. (George Carver) (London : Longman, 1972)
v. 1. Organisms and their environments.
Includes bibliographies and index.
Keywords: Ecology -- Juvenile literature; Biology -- Juvenile literature