The strange story of Soviet music on the bone. The iconic images of gramophone grooves cut onto x-rays of skulls, ribcages and bones have captured the collective imagination way beyond the music scene. Now for the first time, the complete story of the Soviet x-ray record has emerged, as told by the people who made it happen.
Wikipedia's "Jazz on Bones/Rib Recordings" article has more, including this brilliant phrase:
The clandestine approach to circulating banned popular foreign music eventually led to a law being passed in 1958 that forbade the home-production of recordings of "a criminally hooligan trend."