Event Marketer
http://www.eventmarketer.com/
Exhibit Designers and Producers Association
http://www.edpa.com/
Exhibitor Online
http://www.exhibitoronline.com/
American Tradeshow Directory Online
http://www.tradeshows-biz.com/
Center for Exhibition Industry Research
http://www.ceir.org/
Tradeshow Exhibitors Association
http://www.tsea.org/
Euroshop
http://www.euroshop.de/
Display and Design Ideas Online
http://www.ddionline.com/displayanddesignideas/index.shtml