Ritchie, J.C. (1984): Past and Present Vegetation of the Far Northwest of Canada, University of Toronto Press, 251 p., 39 fig., 19 tabl., 4 app., 28 pl. h.-t., 15,5 x 24,5 cm, 35$ can. - Comtois, Paul (Géographie physique et Quaternaire, 1984)