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Fruit Production 2005, U.S. Department of Agriculture, National Agricultural Statistics Service, Michigan Field Office, January 25, 2006,
"Archived copy". 6 Ocak 2007 tarihinde kaynağından arşivlendi. Erişim tarihi: 22 Temmuz 2014., accessed July 20, 2006
"Vitis International Variety Catalogue". Institute for Grapevine Breeding Geilweilerhof (IRZ), Siebeldingen, Germany. 2007. 13 Ekim 2008 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Ağustos 2007.
