RT Journal
T1 QUestions and answers
JF JAMA
JO JAMA
YR 1969
FD July 7
VO 209
IS 1
SP 117
OP 118
DO 10.1001/jama.1969.03160140073033
UL http://dx.doi.org/10.1001/jama.1969.03160140073033
AB