http://en.wikipedia.org/wiki/1,1,1,2-Tetrafluoroethane

http://www.aa1car.com/library/retrofit.htm

http://www.nextag.com/r134a/search-html

http://www.thefind.com/appliances/info-r134a-oil-charge

http://www.pronto.com/mpm/search-r134a/

http://www.allpar.com/eek/ac.html

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http://www.sears.com/shc/s/p_10153_12605_00916155000P?vName=Tools&cName=Auto&MechanicsTools&sName=Auto+Specialty+Tools

http://www.alibaba.com/showroom/R134a/4.html

http://www.griffiths.com/achelp/achelp3.html

http://www.amazon.com/tag/r134a

http://www.surplusrecord.com/cgi-bin/adpop.pl?676005

http://www.shop.com/Robinair_96%22_R134A_Hose_Set-66118072-81992324-p!.shtml

http://www.foxtoolsupply.com/hc12vs.htm

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http://cgi.ebay.com/AC-Air-Conditioner-Electric-Vacuum-Pump-R134A--R12-R22-_W0QQitemZ180433045278QQcmdZViewItem

http://www.alibaba.com/showroom/R134a.html

http://www.jcwhitney.com/jcwhitney/product.jcw?nval=0&statenval=0&productId=2010846&shopid=100001&pageid=13&skuId=220492

http://www.nextag.com/r134a-refrigerant/search-html