The Standardised War-Time Jeep, 1941-45 by John Farley. This is an excellent reference book that tries to show all of the variations of the MB and GPW throughout the war-time period. Mr. Farley does a pretty good job and the book is well worth owning. You used to be able to buy the book through Amazon.com and it is still listed (through the link provided above).
- ISBN-10: 0953447030
- ISBN-13: 978-0953447039
However, the book appears to be out of print as the price is $200 through third party sellers. Good luck in finding a copy!