Report on snow and avalanche conditions in the U.S.A. Western ski resorts. from the 26th of January to the 24th of April 1949
Roch, A. (1949). Report on snow and avalanche conditions in the U.S.A. Western ski resorts. from the 26th of January to the 24th of April 1949. (Eidgenössisches Institut für Schnee- und Lawinenforschung: interner Bericht, Report No.: 98). Eidgenössisches Institut für Schnee- und Lawinenforschung.