Legendre, Pierre. Numerical ecology / by Pierre Legendre and Louis Legendre. - New York : Elsevier, 1998. - xv, 853 p. : ill. ; 25 cm. - Developments in environmental modelling ; 20 . ISBN: 9780444892508 Subjects--Topical Terms: Ecology --Mathematics. Dewey Class. No.: 577.0151 LEG / 2326