slopes. Many passes are closed in winter. Several airports around the Alps (and some within), as well as long-distance rail links from all neighbouring countries, afford large numbers of travellers easy access. See also Notes References Works cited Alpine Convention. (2010). The Alps: People and pressures in the mountains, the facts at a glance Allaby, Michael et al. The Encyclopedia of Earth. (2008). Berkeley: University of California Press. Beattie, Andrew. (2006). The Alps: A Cultural History. New York: Oxford University Press. Benniston, Martin, et al. (2011). "Impact of Climatic Change on Water and Natural Hazards in the Alps". Environmental Science and Policy. Volume 30. 1–9 Cebon, Peter, et al. (1998). Views from the Alps: Regional Perspectives on Climate Change. Cambridge MA: MIT Press. Chatré, Baptiste, et al. (2010). The Alps: People and Pressures in the Mountains, the Facts at a Glance. Permanent Secretariat of the Alpine Convention (alpconv.org). Retrieved August 4, 2012. De Graciansky, Pierre-Charles et al. (2011). The Western Alps, From Rift to Passive Margin to Orogenic Belt. Amsterdam: Elsevier. Feuer, A.B. (2006). Packs On!: Memoirs of the 10th Mountain Division in World War II. Mechanicsburg, Pennsylvania: Stackpole Books. Fleming, Fergus. (2000). Killing Dragons: The Conquest of the Alps. New York: Grove. Gerrard, AJ. (1990) Mountain Environments: An Examination of the Physical Geography of Mountains. Boston: MIT Press. Halbrook, Stephen P. (1998). Target Switzerland: Swiss Armed Neutrality in World War II. Rockville Center, NY: Sarpedon. Halbrook, Stephen P. (2006). The Swiss and the Nazis: How the Alpine Republic Survived in the Shadow of the Third Reich. Havertown, PA: Casemate. Hudson, Simon. (2000). Snow Business: A Study of the International Ski Industry. New York: Cengage Körner, Christian. (2003). Alpine Plant Life. New York: Springer Verlag. Lancel, Serge. (1999). Hannibal. Oxford: Blackwell. Mitchell, Arthur H. (2007). Hitler's Mountain. Jefferson, NC: McFarland. Prevas, John. (2001). Hannibal Crosses The Alps: The Invasion Of Italy And The Punic Wars. Cambridge, MA: Da Capo Press. Reynolds, Kev. (2012) The Swiss Alps. Cicerone Press. Roth, Philipe. (2007). Minerals first Discovered in Switzerland. Lausanne, CH: Museum of Geology. Schmid, Stefan M. (2004). "Regional tectonics: from the Rhine graben to the Po plain, a summary of the tectonic evolution of the Alps and their forelands". Basel: Geologisch-Paläontologisches Institut Sharp, Hilary. (2002). Trekking and Climbing in the Western Alps. London: New Holland. Shoumatoff, Nicholas and Nina. (2001). The Alps: Europe's Mountain Heart. Ann Arbor, MI: University of Michigan Press.