See also: Pennell, James R. 2019. "Challenges and progress in improving the quality and identity of Midwest U.S. Wines." Journal of Wine Research, 30(1):1-14, DOI: 10.1080/09571264.2019.1573726
Pennell, James R. 2017. Local Vino: The Winery Boom in the Heartland. Champaign, IL: University of Illinois Press.