Global Business Travel Association (GBTA)
https://www.gbta.org/
American Society of Travel Advisors
http://www.asta.org/
National Business Aircraft Association
http://www.nbaa.org/
Wyvern
http://www.wyvernltd.com/
Aviation Research Group US (ARGUS)
http://www.aviationresearch.com/
Weather.com
http://www.weather.com/
Gocurrency.com
http://www.gocurrency.com/