A few of the lectures I’ve listened to so far mention sources but do list them as part of the recommended reading. For instance in the progressive era lecture at 4 mins in, Tom mentions a piece by Murray Rothbard about WWI, but it is not listed.
My apologies for just seeing this post now. I added the Rothbard source before seeing this post, because I remembered it recently. If there’s anything else missing, please let me know and I’ll add it right away. I am entering middle age, after all….