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N Engl J Med. 1961 Sep 7;265:486-7.
PECK P.
PMID: 13733828 [PubMed - indexed for MEDLINE]
J Obstet Gynaecol Br Emp. 1962 Feb; 69:142-50.
[J Obstet Gynaecol Br Emp. 1962]
Edinb Med J. 1947 Oct; 54(10):534-9.
[Edinb Med J. 1947]
Med Hist. 1965 Jul; 9:241-8.
[Med Hist. 1965]
J Obstet Gynaecol Br Commonw. 1964 Apr; 71:171-9.
[J Obstet Gynaecol Br Commonw. 1964]
N Engl J Med. 1955 Jul 7; 253(1):26-7.
[N Engl J Med. 1955]
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