Posted By:
barrysloateFrank Keetz put out a self published monograph on all the trade card sets. I'm on vacation now so don't have the exact title, and I'm not sure how you get a copy of it. It lists virtually every baseball trade card known by H804 numbers. But I know them well because I used to have a large trade card collection and often would sell them.
Edited to say Frank, not Ed (his son) wrote the book.