Update

I’ve added information in Compromise of State Department communications in WWII.

Cryptology files on Elizebeth Friedman and Coast Guard Unit 387

Interesting reports on Elizebeth Friedman and Coast Guard Unit 387.

Uploaded to archive.org by mr Jason Fagone.

Interesting report on Luftwaffe operations 1941-43

‘How were German air force resources distributed between different fronts in the years 1941 to 1943 and what are the implications of this case study for understanding the political economy of the period?’ by Dan Zamansky.