Introduction to the principles of plant taxonomy / V.V. Sivarajan ; edited by N.K.P. Robson. Sivarajan, V. V. Robson, N. K. P. Plants Classification. 581.01 SII Includes index. Bibliography p. 223-378 New Dehil : Oxford & IBH, c1991. c1991. 199 Text xiv, 292 p. : http://www.loc.gov/catdir/description/cam024/89034314.htm http://www.loc.gov/catdir/toc/cam029/89034314.htm eng