RT Journal Article SR Electronic T1 A Curious Twin Abortion JF The Journal of the College of General Practitioners JO J Coll Gen Pract FD British Journal of General Practice SP 288 OP 289 VO 7 IS 2 A1 A. F. J. Atkins YR 1964 UL http://bjgp.org/content/7/2/288.2.abstract AB