Greenspan Ralpn J Fly Pushing : The Theory and Practice of Drosophila Genetics .-2nd edn .-978-1-621822-33-2 - 2nd edn - Cold Spring Harbor Laboratory Press, USA, New York 2004 ISBN: 978-1-621822-33-2 Dewey Class. No.: K86:(G:6) P04/B28302