RT Journal
T1 QUestions and answers
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1959
FD May 2
VO 170
IS 1
SP 137
OP 142
DO 10.1001/jama.1959.03010010139037
UL http://dx.doi.org/10.1001/jama.1959.03010010139037
AB