TY - JOUR T1 - The use of vitamin K in the perinatal period JF - Canadian Medical Association Journal JO - CMAJ SP - 13a LP - 14 VL - 140 IS - 1 AU - L. A. Murdoch Y1 - 1989/01/01 UR - http://www.cmaj.ca/content/140/1/13a.abstract ER -