1. Manual of the active principles of indigenous and foreign medicinal plants, as prepared at the laboratory of B. Keith & Co Author(s): B. Keith & Co., author. Publication: New York : B. Keith & Co., 1881 Subject(s): Plant Extracts -- chemistryPhytotherapy
2. Manual of the active principles of indigenous and foreign medicinal plants: as prepared at the laboratory of B. Keith & Co Author(s): B. Keith & Co., author. Publication: Jersey City : The Jersey City Printing Company, 1890 Subject(s): Plant Extracts -- chemistryPhytotherapy
3. Manual of the active principles of indigenous and foreign medicinal plants: as prepared at the laboratory of B. Keith & Co., New York Author(s): B. Keith & Co. Publication: New York : Trafton, 1863 Subject(s): Plant Extracts -- chemistryPhytotherapy