. . . . . . "Chemical Investigations of the Tobacco Plant" . . . . . . . . . . . . "Chemical investigations of the tobacco plant"@en . . "Chemical investigations of the tobacco plant" . . . . . . . . . . . . . . . . . . . "Chemical investigations of the tobacco plant, by Hubert Bradford Vickery, George W. Pucher, Alfred J. Wakeman and Charles S. Leavenworth, with technical assistance of Laurence S. Nolan" . . . . . "Tobacco." . . . . "Plants Analysis." . .