https://publications-cnrc.canada.ca/fra/voir/objet/?id=d2eb493e-645f-4e0a-a895-500165703a06
National Research Council of Canada, 1 juin 1965
In April 1963, a small earthflow involving about 30,000 cu yd of clay took place on the side of a deep ravine near Breckenridge Station, approximately 15 miles...
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