erc: who: Texas State Soil and Water Conservation Board what: Soil Survey of Jackson County, Texas when: 19970500 where: https://texashistory.unt.edu/ark:/67531/metapth224539/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://texashistory.unt.edu/ark:/67531/