Ruppert, Edward E. Invertebrate zoology : a functional evolutionary approach / Edward E Ruppert, Richard S Fox and Robert D Barnes. - 7th ed / . - New Delhi : Cengage Learning , 2004. - xvii,963p. : Ills.,figs. ; 23cm. . Includes bibliography and index ISBN: 9788131501047 RS675.00 Subjects--Index Terms: INVERTEBRATE Dewey Class. No.: 592 / RUP/I