Bibliography


Graydon, D. and Hanson, K. Mountaineering The Freedom Of The Hills. 6th edidtion.1997. The Mountaineers. Seattle, Washington.

Hecht, E. Physics Algebra/Trig. 3rd edition. 2003. Thomson Brooks/Cole. Pacific Grove, California.

Long, J. Climbing Anchors. 1993. The Globe Pequot Press. Guilford, Connecticut.

Beal Ropes. http://www.bealropes.com/english.dir/home.html

Bluewater Ropes. http://spelean.com.au/BW/TM/BWtechmain.html

Petzl. http://www.petzl.com/petzl/SportConseils?MotRecherche=Quick+Search&Langue=en&Activite=14&Famille=0&Conseil=56&Produit=

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