A fellow in the Flames of War forum turned me on to the Army Heritage Collection Online, which has a database of military publications converted to .pdf files. Some of the files they have aren't all that big...but some of the ones I want are HUGE. The ones involving the evolution of the Aggressor program. The maintenance books on tanks and armored cars. The field manuals detailing American warfighting doctrine of World War II. Technical dictionaries of the Japanese language. And stuff I haven't even found yet, but am assured they're there to be found.