RT Journal
T1 MEdicine at work
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1959
FD January 31
VO 169
IS 5
SP 485
OP 495
DO 10.1001/jama.1959.03000220065012
UL http://dx.doi.org/10.1001/jama.1959.03000220065012
AB