Coburn, F. D. (1907). Alfalfa, lucerne, Spanish trefoil, Chilian clover, Brazilian clover, French clover, medic, purple medic -- (Medicago sativa): Practical information on its production, qualities, worth and uses, especially in the United States and Canada. Orange Judd Co..
Dyfyniad Arddull ChicagoCoburn, F. D. Alfalfa, Lucerne, Spanish Trefoil, Chilian Clover, Brazilian Clover, French Clover, Medic, Purple Medic -- (Medicago Sativa): Practical Information on Its Production, Qualities, Worth and Uses, Especially in the United States and Canada. New York: Orange Judd Co., 1907.
Dyfyniad MLACoburn, F. D. Alfalfa, Lucerne, Spanish Trefoil, Chilian Clover, Brazilian Clover, French Clover, Medic, Purple Medic -- (Medicago Sativa): Practical Information on Its Production, Qualities, Worth and Uses, Especially in the United States and Canada. Orange Judd Co., 1907.