Special to the Advance EDINBURG, Texas —The Museum of South Texas History will host the Sunday Speaker Series presentation, “Rebecca Flores and the Struggle for Field Sanitation in the Lower Rio Grande Valley,” featuring Brent Campney at 2 p.m. April 28 in the Courtyard Gallery.This presentation will discuss the struggle for field sanitation such as women’s restrooms by Rebecca Flores and the United Farm Workers in the Lower Rio Grande Valley in the 1970s and 1980s.Campney is a history professor at the University of Texas Rio Grande Valley. His research on the Lower Rio Grande Valley has been published in ...