RT Journal
T1 ON the diagnosis of pregnancy in the early months
JF JAMA
JO JAMA
YR 1989
FD June 16
VO 261
IS 23
SP 3468
OP 3468
DO 10.1001/jama.1989.03420230122040
UL http://dx.doi.org/10.1001/jama.1989.03420230122040
AB