RT Journal T1 COuncil on physical therapy JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1939 FD January 21 VO 112 IS 3 SP 238 OP 239 DO 10.1001/jama.1939.02800030048012 UL http://dx.doi.org/10.1001/jama.1939.02800030048012 AB