Besides the ones mentioned above, here are several others I have;
1. Greenberg's Guide to Lionel Trains 1945-1969 Volume IV Uncatalogued Sets
2. Standard Catalog of Lionel Train Setd 1945-1969 by David Doyle
3. Authoritative Guide to Lionel's Promotional Outfits 1960-1969 by John W. Schmid