erc: who: Kumins, Lawrence C. what: Natural Gas Prices: Overview of Market Factors and Policy Options when: 20010123 where: https://digital.library.unt.edu/ark:/67531/metacrs1673/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/