References

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Climbat: Amman. "Bouldering, Top-Rope and Lead Climbing." Bouldering, Top-Rope and Lead Climbing. Climbat, n.d. Web. 17 Apr. 2015. <http://www.climbat.com/v_portal/informacion/informacionver.asp?cod=4562&te=436&idage=4816&vap=0>.

Westland, Leo. "The Physics of Climbing - and Falling." The Guardian. Guardian News and Media, 19 June 2012. Web. 17 Apr. 2015. <http%3A%2F%2Fwww.theguardian.com%2Fscience%2Flife-and-physics%2F2012%2Fjun%2F09%2Fclimbing-holidays-physics>.

Berry, Adrian, and John Arran. Trad Climbing : The Positive Approach to Improving Your Climbing. Sheffield: Rockfax, 2007. Print.

Eiselt, Julie. "Expert Advice." Carabiners: How to Choose. Recreational Equipment, Inc., 25 Mar. 2015. Web. 17 Apr. 2015. <http://www.rei.com/learn/expert-advice/carabiners.html>.

Silitch, Michael. "Expert Advice." Climbing Ropes: How to Choose. Recreational Equipment, Inc., 12 Feb. 2012. Web. 17 Apr. 2015. http://www.rei.com/learn/expert-advice/ropes.html

The International Climbing and Mountaineering Federation. Risk Management & Safety Label: Safety Standards, Jun. 2014. Web. 17 Apr. 2015. http://www.theuiaa.org/upload_area/UIAA-101_ropes_June_2014_new-equations.pdf