RT Journal Article SR Electronic T1 Sergey Tolstoy and The Doukhobors: The Halifax Quarantine JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1600 OP 1602 DO 10.1503/cmaj.050362 VO 174 IS 11 A1 Ian Cameron YR 2006 UL http://www.cmaj.ca/content/174/11/1600.abstract