Yeah, so I bought the book the Buckminster Fuller Master Index credits Bucky's crib design to: the all-new 1946 edition of Louise Zabriskie's parenting handbook, Mother & Baby Care in Pictures.
Sure enough, there's the Kiddie Koop in all its mesh box glory. NO frickin' idea where Fuller fits into the picture, though; he's not mentioned once. And neither is his planet-changing vision or design sense; this thing looks strictly off-the-40's-shelf.
So while we wait for the keepers of Fuller's archive at Stanford to get back to us, I'll post an interesting scan or invaluable snippet of dadvice from Mrs. Zabriskie.