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Conservatoire botanique national des Pyrénées et de Midi-Pyrénées

Union internationale pour l'étude du quaternaire, Wright, H.E., Osburn, W.S., 1968 . Artic and alpine environments : Proceedings, VII congress, international association for quaternary research, Boulder-Denver, Colorado, August 14-September 19, 1965. Indiana university press, London. 1 vol. (XII-308 pp.) : fig., cartes, graph ; 23 cm