Cass County Conservancy - Preserves the history and culture of the county by promoting and financially supporting projects that represent historical east Texas life. Includes projects, resources, and news. - http://www.cassconservancy.org/
Butterflies of Cass County, Texas - Information about and pictures of all the known species of butterflies in the county. - http://www.butterfliesandmoths.org/map?dc=5535&_dcc=1&si=44
Handbook of Texas Online : Cass County - Current and historical information about Cass County. - http://www.tsha.utexas.edu/handbook/online/articles/CC/hcc7.html
Cass County TXGenWeb - Cass County Texas Genealogy and history data. - http://www.rootsweb.com/~txcass/
Amphibians and Reptiles in Cass County - Texas Cooperative Wildlife Collection list of species found in the county. - http://wfscnet.tamu.edu/tcwc/checklist/CASS034.HTM