Tune in to hear the very knowledgeable, and entertaining, Robert Mace Tuesday on Wonderful World, the radio show about river issues at KZSM.org True Community Radio in San Marcos TX . 11:30 a.m. Tuesday April 9th on FM 104.1 or go to KZSM.org and click on "Listen". Robert Mace will talk about his new publication about the many springs of Texas that are no longer flowing.