A study, by Christopher Ellis,  of Debert style fluted points from the Debert Site in Nova Scotia and a comparison with other fluted point styles in the Northeast. From the Journal of Canadian Archaeology(2004).
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http://anthropology.uwo.ca/cje/Publicationpdfs/Debert%20Fluted%20Points.pdf
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From the above article, this highly illustrative demonstration of the changing morphology of fluted points as a result of tip resharpening and rebasing: