RT Journal
T1 QUestions and answers
JF JAMA
JO JAMA
YR 1969
FD July 21
VO 209
IS 3
SP 423
OP 424
DO 10.1001/jama.1969.03160160059035
UL http://dx.doi.org/10.1001/jama.1969.03160160059035
AB