Sokal, Robert R. Biometry : the principles and practice of statistics in biological research / by Robert R. Sokal and F. James Rohlf. - 2d ed. - New York : W. H. Freeman, 1981. - xviii, 859 p. : ill. ; 24 cm. ISBN: 0716712547 Subjects--Topical Terms: Biometry. Dewey Class. No.: 574.072 SOK 'R' / 1209