Catastrophe and Social Change: Based upon a Sociological Study of the Halifax Disaster », Studies in History, Economics and Public Law, vol.94, pp.1-152, 1920. ,
Disaster and the Sequence-Pattern Concept of Social Change, septembre 1932, pp.207-218 ,
Man and Society in Calamity: The Effects of War, Revolution, Famine, Pestilence upon Human Mind, Behavior, Social Organization and Cultural Life, 1942. ,