I'll take the lack of friendly banter from you folks as an unequivocal affirmation to my previous presumption.
Because I was curious... and sadly have nothing better to do with my life, right now anyway... I happened to check my newer old copy of Overstreet (2006 Ed.). As
jrvandore has mentioned WM #12 is indeed all reprint material and DCM does have two of the books from which that material was taken (WM #3 and Weird Tales of The Future #6). The third book is Mr. Mystery #8, which by the looks of it might be more pricier to acquire than WM #12... at least on the face of it, from comparing the pricing data from the OPG.