Books associated with this subject tend to be expensive, or go out of print very quickly. There are many different places on the Internet which make it easy to track down second-hand and out-of-print books around the world. Listed here are some of the ones that I use.
- Acqweb’s rare and antiquarian book vendors
- Bufo Books
- Clique (The): British bookdealers
- Digital Bibliophile Community (The)
- Military Books