Trehan, K. . Biotechnology / Textual Documents K. Trehan. - 1st ed / - New Delhi : Willey Eastern Ltd , 1990. - 286p. : ill ; 23cm. . Index ISBN: 81-224-0129-5 Subjects--Index Terms: Botany Biotechnology Engineering Dewey Class. No.: 581.6 / Tr 71 Bi 620.8 / Tr 71 Bi