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Conservatoire botanique national des Pyrénées et de Midi-Pyrénées

Ebersole, J.J., Bay, R.F., Conlin, D.B., 2002 . Vegetation restoration of alpine social trails on Colorado's 14,000-foot peaks. In: Proceedings high altitude revegetation workshop n°15. Colorado Water Resources Research Institute, Colorado State University, [S.l.]: 102-122.