Texas Forestry
http://www.fs.fed.us/fire/fmt/fmt_pdfs/012_01.pdf - info about Texas Forestry radio system circa 1950s
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<http://tfsfrp.tamu.edu/toolbox/Documents/State_Operations_Plan.pdf>
Appendix B has a 2010 list of freqs
Apparently they have a few simplex freqs for plane to dispatcher comms
- and a bunch of repeaters scattered around the state