RT Journal
T1 QUestions and answers
JF JAMA
JO JAMA
YR 1969
FD June 30
VO 208
IS 13
SP 2479
OP 2480
DO 10.1001/jama.1969.03160130063031
UL http://dx.doi.org/10.1001/jama.1969.03160130063031
AB