Purohit, S.S Biotechnology : Fundamentals and applications / by S.S Purohit - 3rd ed. - New Delhi : Agrobios , 2003 . - 720 p. Hard Back ISBN: 8177540027 Subjects--Topical Terms: BiotechnologyProtein engineeringDNA technologyGene cloning vectors Dewey Class. No.: 660.6 / PUR-B