Soft covered book titled INTERACTING SYSTEMS IN DEVELOPMENT by James Ebert and Ian Sussex. 1970, Second Edition.  338 pages. A modern synthesis of descriptive and experimental approaches, this book offers a balanced presentation ranging from an up to date treatment of the facts and principles of organogenes to a penetrating exposition of the genetics and molecular basis of development of both plants and animals. Book is in Good condition. Pages are clean and intact, and the binding is tight. The cover has a few creases and is slightly worn at the edges. A nice addition to your science library!