US Army 5 Ton Truck M939 Series: M923, M925, M927 and M928, Photo Manual: Petr Brojo, Jan Mostek: 9788023820799: Amazon.com: Books
File:Bundeswehr MAN 5to.gl.jpg - Wikimedia Commons
Tankograd 5081 Cold War Warrior: The 5-ton, 7-ton and 10-ton MAN-Kat I Trucks in Cold War Exercises with the German Bundeswehr: Carl Schulze: Amazon.com: Books
Tankograd Militar Fahrzeug - Special No. 5027 - MAN Kat I: MAN Tactical Trucks of the Follow-On Generation of the German Bundeswehr: Blume, Peter: Amazon.com: Books