E-Malt. E-Malt.com News article: Germany: The Barth-Haas Group released the alpha acid values of hops of the crop years 1997–2006 and updated average values
E-Malt.com News article: Germany: The Barth-Haas Group released the alpha acid values of hops of the crop years 1997–2006 and updated average values The 2006 . . . get full article 29 November, 2006