574.9
W349P
           Watts, David
               Principles of biogeography an introdiction to the fuctional mechanism of ecosystems \ David Watts - London : McGraw-Hill, 1971.
               xvi, 401p. - European geography and geology series/ ed by E H Brown .
                ISBN: 07-094145-9

79005
                Subjects: Biotic community; Biogeography.