LEAD Link Dump

http://bear.sbszoo.com/

http://www.unr.edu/NevadaSat/BalloonSats/Balloonsat%20Pages/microtrak.html

http://www.eoss.org/wbaltrak/

http://space.1337arts.com/

http://weather.uwyo.edu/polar/balloon_traj.html

Basic numbers for different lighter-than-air gas http://www.chem.hawaii.edu/uham/lift.html

A source for commercial weather ballons http://scientificsonline.com/product.asp_Q_pn_E_3041755

How helium balloons work http://science.howstuffworks.com/helium2.htm

American Science and Surplus has cheap mylar rolls and other cheap supplies http://www.sciplus.com/recommend.cfm/recommendid/5529

http://twit.tv/kiki34

http://spacehack.org/

List of GPS receivers known to work over 60k feet. http://showcase.netins.net/web/wallio/GPSrcvrsvs60kft.htm

GPS ordering page for cheap GPS equipment. http://www.usglobalsat.com/