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https://www.ttb.gov/ttb-establishes-crystal-springs-napa-valley-american-viticultural-area
TTB Establishes Crystal Springs of Napa Valley American Viticultural Area | TTB: Alcohol and...
crystal springsnapa valleyamerican viticulturalttbestablishes
https://www.ttb.gov/regulated-commodities/beverage-alcohol/wine/established-avas
Established American Viticultural Areas | TTB: Alcohol and Tobacco Tax and Trade Bureau
The following tables list all the established American Viticultural Areas, or AVAs (see 27 CFR part 9 for more information).
tobacco tax tradeamerican viticulturalttb alcoholestablishedareas
https://www.visitnapavalley.com/wineries/appellations/
Appellations of Napa Valley, CA | 16 American Viticultural Areas
Learn more about the 16 distinct wine-producing regions within the Napa Valley appellation that have particular microclimates and geographic characteristics.
napa valley ca16 americanappellationsviticulturalareas