erc: who: Johnson, Renée what: Greenhouse Gas Emissions and Sinks in U.S. Agriculture when: 20180917 where: https://digital.library.unt.edu/ark:/67531/metadc1390550/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/