Last, W. M. and Ginn, F. M., 2007 Clay Mineralogy. Final Report to PetroCanada. 65 p.
Ahmed, M., and Last, W. M., 1991, Deposition and diagenesis of the MC3 Member of the Mission Canyon Formation, Pierson Field, Manitoba. In: Christopher, J.E., and Haidl, F. M. (eds.), Proceedings 6th International Williston Basin Symposium, Saskatchewan Geological Society Special Publication Number 11, pp. 123-129. pdf
Last, W. M., and Shum, W., 1991, Diagenesis of the Winnipeg Formation: A Regional Study. In: Christopher, J.E., and Haidl, F. M. (eds.), Proceedings 6th International Williston Basin Symposium, Saskatchewan Geological Society Special Publication Number 11, pp.14-20. pdf
Last, W. M., and Edwards, W.W., 1991, Petrology of the Middle Bakken Member in the Daly Field, Southwestern Manitoba. In: Christopher, J.E., and Haidl, F. M. (eds.), Proceedings 6th International Williston Basin Symposium, Saskatchewan Geological Society Special Publication Number 11, pp. 64-69. pdf
Kovac, L.J., and Last, W. M., 1991, Mineralogy and Geochemistry of Cretaceous Oil Shales in Manitoba. In: Christopher, J.E., and Haidl, F. M. (eds.), Proceedings 6th International Williston Basin Symposium, Saskatchewan Geological Society Special Publication Number 11, pp. 275-282. pdf
Last, W. M. and Edwards, W., 1989, Sedimentology and Reservoir Quality of the Bakken Formation in Manitoba. Final Report to Petroleum Aid to Education, 65 p.
Rosenthal, L. and Last, W. M., 1987, The Winnipegosis Formation on the Northeastern Margin of the Williston Basin. Proc. 2nd Internat. Symp. Devonian System, Abst. Vol., p. 197.
Last, W. M., 1986, The Exshaw Formation: Geochemistry of a Major Source Rock in Western Canada. In: Proc. Manstrat Conference, University of Manitoba, p. 24-30. pdf
Tilley, B. J., and Last, W. M., 1980, Fluvial and Deltaic Sedimentology of the Upper Mannville in East-central Alberta. Sask. Geol. Soc. Spec. Paper No. 5, p. 217. (invited presentation).
Last, W. M., 1975, The Exshaw Formation in Western Canada, Source Rock Potential, Internal Report to Shell Canada Ltd., 168 pages.
Last, W. M., 1970, Stratigraphy of the Middle Devonian Sequence in Southwestern Wisconsin. In: The Second Annual Wisconsin University Geological Field Conference, The Upper Mississippi Valley Zinc Lead District, p. 35-46.