erc: who: Dallas (Tex.). Police Department. what: [Memo to W. R. Rollins from Jack L. Beavers, January 28, 1988] when: 19880128 where: https://texashistory.unt.edu/ark:/67531/metapth338037/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://texashistory.unt.edu/ark:/67531/