RT Journal Article SR Electronic T1 Premature rupture of membranes at term: a medical and economic rationale for active management JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1541 OP 1542 VO 157 IS 11 A1 Duff, P. YR 1997 UL http://www.cmaj.ca/content/157/11/1541.abstract AB