About Duff Crerar Duff Crerar is Instructor Emeritus of History, Department of Arts and Education, Grande Prairie Regional College. Books by Duff Crerar Padres in No Man's Land Canadian Chaplains and the Great War, Second Edition by (author) Duff Crerar Padres in No Man's Land, Second Edition Canadian Chaplains and the Great War by (author) Duff Crerar Padres in No Man's Land, First Edition Canadian Chaplains and the Great War by (author) Duff Crerar