| References |
- Robinson, J. 2006. The Oxford Companion to Wine. Third edition. Oxford University Press.
- Vitis International Variety Catalogue (VIVC). Federal Centre for Breeding Research on Cultivated Plants (BAZ).
Institute for Grapevine Breeding Geilweilerhof (IRZ). August, 2007. Link
The former National Grape Registry (NGR) was initially compiled and annotated using the earlier version of the Vitis database. The VIVC underwent a significant update beginning in 2007. Corresponding updates to this Registry will be made as necessary.
- Calo, A. et al. 2001. Vitigni d’Italia. Edagricole-Edizioni Agricole della Calderini. Bologna, Italy. (In Italian)
- Alcohol and Tobacco Tax and Trade Bureau (TTB). Code of Federal Regulations Title 27 Part 4.91 List of approved prime names. Link
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