Alpinquartett

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quartett

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Allmenfilms (V1.7c), Claudine Hollinger (V1.1b, V1.1c, V1.1d, V1.2b, V1.2d, V1.4c, V1.8c, V1.8d), Ernst Betschart (V1.3d), Inauen-Schätti AG (V1.7d), Kraftwerk Sanetsch AG (V1.7a), Michael Meier (V1.1a, V1.2a, V1.2c, V1.3a, V1.3b, V1.3c, V1.4a, V1.4b, V1.4d, V1.5a, V1.5b, V1.5c, V1.5d, V1.6a, V1.6b, V1.6c, V1.6d, V1.8a, V1.8b), Michael Sieber (V1.7b).