The "Encyclopedia of Source Illustrations" by J. G. Heck is a comprehensive reference book published in 1972 as a trade paperback. With a focus on design and illustration, this book provides a valuable resource for those interested in graphic arts. The 301-page volume features a wealth of illustrated material, making it a practical tool for both students and professionals in the field. Written in English and published by Morgan & Morgan, Incorporated, this book is a key reference for anyone looking to explore the world of dictionaries and illustration.