https://geoscan.nrcan.gc.ca/starweb/nrcanphoto/servlet.starweb?path=nrcanphoto/nrcanphotofastlink_f.web&search1=R=393
Natural Resources Canada, 28 juillet 1996
Lawrence, T., Retrogressive flow slide within exposed lake bottom sediments of Lake Ha! Ha!, Natural Resources Canada Photo Collection # 1997-41O, 1996
Photographie