MMan, machine, and snowMan, machine, and snowde Nigel J. R. AllanMateriasLand useRecreational surveysWinter sportsEdiciones (1)Man, machine, and snow (1975)Dept. of Geography, Syracuse University · inglésMás obras de Nigel J. R. AllanHuman impact on mountainsMountains at riskHHuman Impact on MountainsHuman Impact on Mountains