U.S. Army Field Manuals--World War II

What is the reason some are missing?

 

That's a nice find. As a kid, I read through the following FM's out sheer curiosity:

1. physical training
2. explosives and demolitions
3. mountain training
4. jungle operations
5. combatives
6. browning BAR manual
7. M3 submachine gun manual
8. preventive maintenance

Obviously, a lot of them were prepared post-war. The PM manual included simple instructions to service and care for Honest John nuclear-tipped missiles, and even Nike anti-aircraft missile launchers.