Federal agencies can be found under the Texas State listings at Texas - Texas Federal Scanner Frequencies and Radio Frequency Reference (radioreference.com)
San Antonio Missions National Historical Park is a National Historical Park and part of a UNESCO World Heritage Site preserving four of the five Spanish frontier missions in San Antonio, Texas, USA. These outposts were established by Catholic religious orders to spread Christianity among the local natives. These missions formed part of a colonization system that stretched across the Spanish Southwest in the 17th, 18th, and 19th centuries.
Most USSS channels are nationwide and can be found under the National Database listing