1.
Am J Obstet Gynecol
; 122(4): 540, 1975 Jun 15.
Article
in English
| MEDLINE
| ID: mdl-1096614
2.
N Engl J Med
; 278(18): 1024, 1968 May 02.
Article
in English
| MEDLINE
| ID: mdl-5644588