There is a metasearch engine for used and rare books: . (It searches something like 50 sites and consolidates the results.)
I just went to that site and put "upper room" in the title box and "1935" & "1945" in the date range boxes (without the quotations marks - and got 46 different hits.?
Many of these are not what you are looking for, but several of them are.?
Once that's done, I would advise signing up at??and then entering "upper room" and the dates in their "WANTS" list section.?
This is the largest site for used and rare books in the world... so once you have done this, whenever someone posts a new listing for Upper Room, you will get an email notifying you of that new listing.?
william schaberg