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Rauzi, F., Painter, L. I., & Dobrenz, A. K. (1969). Mineral and Protein Contents of Blue Grama and Western Wheatgrass (Contenido de Minerales y Proteinas en el Navajita Azul (Bouteloua gracilis) y Western Wheatgrass (Agropyron smithii)). Journal of Range Management, 22(1), 47. doi: 10.2307/3896033