Handbook of Texas Online - Current and historical information about Llano County. - http://www.tsha.utexas.edu/handbook/online/articles/LL/hcl12.html
Amphibians and Reptiles in Llano County - Texas Cooperative Wildlife Collection list of species found in the county. - http://wfscnet.tamu.edu/tcwc/checklist/LLANO150.HTM