Grace, James B. Structural equation modeling and natural systems / James B. Grace. - Cambridge, UK ; New York : Cambridge University Press, 2006. - xii, 365 p. : ill. ; 24 cm. Includes bibliographical references (p. 350-360) and index. Standard No.: 9780521546539 (pbk.) Subjects--Topical Terms: Biotic communities--Mathematical models.Multivariate analysis. Dewey Class. No.: 577.01519535 GRA