Hi there! I'm not entirely sure if this thread will gain enough interest or if some are actively seeking those out, but I was curious if anyone happened to be familiar of a series called "Random House Educational Media" or "Beginner Book Filmstrip Sets". A series of rare audio cassette recordings from Random House.
(Apologies for the large images!) But these happen to have been produced around the 1970's under the moniker "Beginner Book Filmstrips" and I've been collecting their cassette tapes for quite sometime since nobody appears to have uploaded them, and which luckily I myself have been archiving such on my Internet Archive account: