Raven, Peter H. Biology of plants / Peter H. Raven, Ray F. Evert, Susan E. Eichhorn. - 6th ed. - N.Y. : W.H. Freeman and Co. : Worth Publishers, c1999, 2003 printing. - xv, 944 p. : ill. (some col.) ; 29 cm. ISBN: 1572590416 (pbk.) Subjects--Topical Terms: Botany. Dewey Class. No.: 580 / RAV