Rodriguez, Raymond. creator text S.l.] Addison-Wesley Pub (Sd) 1983 monographic 236 p. ; Recombinant DNA Genetic engineering--Technique 0201108704 (paperback) 9780201108705 (paperback) http://www.amazon.com/exec/obidos/ASIN/0201108704/chopaconline-20 http://www.amazon.com/exec/obidos/ASIN/0201108704/chopaconline-20