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In 1972, David Solf authored a general information pamphlet for the Alaska Dept. of Fish and Game on the natural history of L. canadensis. It turned out to be his only printed work on the subject of otters.
Because I believe it is important to preserve Solf's work for scientific posterity, I am here republishing the original, unedited text of the 1972 pamphlet.
Additionally, here is the 1972 article in PDF format (click on either image below to download):