TY - JOUR T1 - Causes of birth asphyxia and trauma JF - Canadian Medical Association Journal JO - CMAJ SP - 1077 LP - 1085 VL - 94 IS - 21 AU - J. R. O'Brien AU - R. H. Usher AU - G. B. Maughan Y1 - 1966/05/21 UR - http://www.cmaj.ca/content/94/21/1077.abstract ER -