erc: who: David S. Castle Co. what: School Building Alterations, Royston, Texas: Roof Plan and Details when: 19370623 where: https://texashistory.unt.edu/ark:/67531/metapth789913/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://texashistory.unt.edu/ark:/67531/