The Steranko History can be hard to find these days, but it is available online to download if you look carefully. I would prefer it to be in print and widely available (and the remaining volumes to be published!), but this is what one has at the present time.
These two volumes were oversized and are incredibly hard to scan, and the one set I've found to download is of photographs of the pages, not actual scans. I found them to be readable enough, but then again, I know the original books pretty much backwards and forwards by now. The Captain America chapter is in Vol. 1 and the Aviators chapter is in Vol. 2. The Captain Marvel chapter does deal with the Monster Society of Evil, which included most of Captain Marvel's stereotyped villains, including Nippo.
The Pulp chapter in volume 1 discusses the Oriental Menace pulps as well as the invasion fears represented by pulp series like Operator #5 to show that it wasn't just WWII -- these stereotypes and fears existed before as well.
Be careful with Goulart. He doesn't source his stories and claims very well (if at all). He also tends to repeat himself in book after book, so if you have one of his many volumes of comic history, you don't need to look to hard for any others.
if you can find them, the Taylor History of Comics books by Mike Benton are pretty solid. since they were hardcover, oversized volumes, they were pretty much marketed to libraries. they may be available through inter-library loan. Benton has a pretty impressive list of sources for each volume, but he also utilized some known inaccurate sources like the infamous Crawford Encyclopedia of Comics. I don't recall if any of Benton's volumes specifically dealt with propaganda elements.
