Rapport annuel - SCHWEIZER ALPEN-CLUB. Sektion La Chaux-de-Fonds (La Chaux-de-Fonds, 1954)
In French. No.60. 1930 - 1936; 1938 - 1948. No.61 1955 T507.13; No.62 1956 T513.2; No.63, 1957 T513.3. Library's holdings are incomplete