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Karls, Caleb, Dan Undersander, David Combs, Derek Donnelly, Cara Engel, Donald Miller, و Dan Schaefer. "PSVIII-30 Reduced-lignin Alfalfa Digestibility and Effects On Performance of Growing Beef Steers." J Anim Sci 2020.

Karls, Caleb, et al. "PSVIII-30 Reduced-lignin Alfalfa Digestibility and Effects On Performance of Growing Beef Steers." J Anim Sci 2020.