http://www.rbr.com/ ©2007 Spoonlabs d.o.o. Vivvo CMS 4.1 2012-02-11T16:07:30-06:00 http://www.rbr.com/radio/26292.html 2010-07-29T11:48:00-05:00 2010-07-29T11:48:00-05:00 Jack Messmer Univision’s refusal to subscribe to Portable People Meter (PPM) ratings data, except in Houston, has been holding down revenues for Arbitron, as noted in the