RT Journal
T1 QUestions and answers
JF JAMA
JO JAMA
YR 1969
FD May 5
VO 208
IS 5
SP 871
OP 873
DO 10.1001/jama.1969.03160050125036
UL http://dx.doi.org/10.1001/jama.1969.03160050125036
AB