Seeking help abroad, O'Keefe consulted with German winemaker Karl Werner, who put him in touch with Helmut Becker, chief viticulturist of the Geisenheim Grape Breeding Institute in Germany.
Grand Prix motorcycle racing | Grand Canyon | Grand Trunk Railway | Grand National | Grand Rapids, Michigan | Grand Prix | Grand Duchy of Lithuania | Grand Central Terminal | Grand Theft Auto: San Andreas | Grand Theft Auto IV | Grand Tour | château | Grand Ole Opry | Grand Duchy of Hesse | Grand Rapids | Grand Vizier | Grand Union Canal | Houston Grand Opera | Grand Theft Auto V | Grand Théâtre de Genève | Grand Prix motor racing | Grand Duchy of Mecklenburg-Schwerin | Grand Theft Auto | Grand Prix du Disque | Grand Palais | Grand Theft Auto: Vice City | Grand Theft Auto (series) | Grand Forks, North Dakota | Grand Canyon National Park | Grand Trunk Road |