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2013. Weese, Scott and Jelinski, Murray. This study evaluated the fecal bacterial microbiota of calves on multiple farms and assessed the impact of antibiotic use and farm on the microbiot... Scholars Portal Dataverse.
2011. Title from title screen (viewed on June 24, 2011). At head of title: World Petroleum Resources Project. "March 2011.". [Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2011].