R.W. Widdis, Neighbours in Paradox: The Evolution of the Canadian-American Borderlands, 1784-2017 Volume One: Beginnings, From Frontiers to Borderlands, 1784-1870 (currently being examined) Volume Two: Transformations: Configurations and Reconfigurations during the Transition from Modernity to Post-Modernity (currently being edited).
R.W. Widdis, ed., History and the Canada-United States Border: Insights and Approaches (forthcoming University of Ottawa Press, 2019).
R.W. Widdis, ed., The Prairies and Northern Great Plains Borderland: Themes and Issues from the Interior of North America (forthcoming University of Ottawa Press, 2019).
V. Konrad, J. Laine, I. Liikanen, J. Scott, and R. Widdis, “The Language of Borders,” in S. Brunn, ed. The Geography of Language (forthcoming 2018).
R.W. Widdis, “The Spatial Grammar of Migration Within the Canadian-American Borderlands at the Turn of the Twentieth Century,”in B. Bryce and A. Freund, eds., Entangling North America: Space and Migration History (Gainesville: University Press of Florida, 2015), 61-96.
R.W. Widdis, “Railroads and Borderland Spaces: The Canada-U.S. Case,” The Canadian Geographer (forthcoming 2019).
R.W. Widdis, “Greater New England as Cultural Borderland: A Critical Appraisal,” Acadiensis XLVI, 1 (2017): 97-121.
R.W. Widdis, “Crossing an Intellectual and Geographical Border: The Importance of Migration in Shaping the Canadian-American Borderlands at the Turn of the Twentieth Century,” Social Science History 34, 4 (2010), 445-497.