Southwood, T.R.E. Ecological Methods / Textual Documents T.R.E. Southwood. - 2nd ed. / - England : English Language Book Society/Longman , 1978. - xxiii,516p. : ill ; 23cm . Index ISBN: 0 412 15880 9 Subjects--Index Terms: Zoology Ecology PG-Zoology T/G-Zoology Dewey Class. No.: 591.5 / So 89 Ec