Tradeshow calendar:

http://www.nferias.com/calendario.c/ (international)
http://www.ifema.es/Institucional_01/ferias/calendario_ferial/actual/index.htm (Madrid)
http://www.fira.es/showsCongresses/showEdCalendar.do (Barcelona)
http://www.feriazaragoza.com/default.aspx?info=000039 (Zaragoza)
http://horizontal.feriavalencia.com/calendario/index.jsp?&&& (Valencia)


Web portal:

http://www.mundoferial.com/ (Mundo ferial)
http://www.revistaexpone.com/ (Expone)
http://www.estrategias.com/ (Advertising strategies)
http://www.interactivadigital.com/ (Online Resources)
http://www.controlpublicidad.com/ (Advertising)
http://www.adtitudtv.com/ (Youtube commercials)
http://www.urbancatarsis.com (BCN cultural magazine)
http://www.aimfe.com (Spanish Tradeshow Marketing Association)
http://clubdecreativos.com (Creative Club)
http://www.bcd.es (Barcelona Design Centre)
http://www.adg-fad.org (Association of art directors and graphic designers)