Gabus, J.H.Masson, H.2008-02-132008-02-132008-02-131980https://infoscience.epfl.ch/handle/20.500.14299/17738Martigny-Bex-Solalex Anzeinde-Derborence-Ardon-Sion. - Excursion No. 1 Helvetic Alps of Western Switzerland.text::book/monograph::book part or chapter