Any serious history of the subject (WWII, Hitler, etc) that covers that time period would include it. It was integral to Hitler's foreign policy. Remember that

Any serious history of the subject (WWII, Hitler, etc) that covers that time period would include it. It was integral to Hitler's foreign policy. Remember that the purpose of propaganda is not to persuade people as much as to create enough uncertainty and confusion that there is inaction - like FUD in the computer industry.