ACKNOWLEDGMENTS
The author would like to thank his son Dr. Mark Perlin for all his efforts in designing and publishing this electronic web-based book. The author is also extremely grateful to Donna Scheuble who scanned in all the photographs, entered the vast amount of database and text information, and assiduously checked to ensure the consistency of the information. He also appreciates the work of Dr. Ben Goldstein and End Point Dev in providing internet support services throughout the life cycle of this publication. For the Fourth Edition, his personal aide Sandra Thompson transcribed the first draft of additions in longhand, and his son Dr. Ken Perlin edited and typed these additions.