Campos-Ortega Jose & Hartenstein Volker The embryonic development of Drosophila melanogaster .-2nd edn .-978-3-662-22491-5 - 2nd edn - Springer-Verlag, Germany, Berlin 1997 ISBN: 978-3-662-22491-5 Dewey Class. No.: K871:7 N97/B28112