James Mennell, MD wrote a book on manipulative therapy and his son John Mennell wrote a book on joint pain and another on back pain and manipulation as well, and on one the musculoskeletal system. James Mennell, MD passed on in 1957 a year after his last book. I do not know if John Mennell is still alive. They both made considerable contributions to the use of manipulation in the care of joint pain.
Jerry Hesch, MHS, PT