erc: who: United States. General Accounting Office. what: Managing for Results: EPA Faces Challenges in Developing Results-Oriented Performance Goals and Measures when: 20000428 where: https://digital.library.unt.edu/ark:/67531/metadc293015/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/