Crop and Soil Sciences - 1971 COPE, W. A., BELL, T. A., & SMART, W. W. G. (1971). SEASONAL CHANGES IN AN ENZYME INHIBITOR AND TANNIN CONTENT IN SERICEA LESPEDEZA. CROP SCIENCE, 11(6), 893-+. https://doi.org/10.2135/cropsci1971.0011183X001100060039x COPE, W. A., & BURNS, J. C. (1971). RELATIONSHIP BETWEEN TANNIN LEVELS AND NUTRITIVE VALUE OF SERICEA. CROP SCIENCE, 11(2), 231-&. https://doi.org/10.2135/cropsci1971.0011183X001100020019x Collins, W. K., Hawkes, S. N., & Kittrell, B. U. (1971). Comparison of MH-30 and Royal MH-30 on sucker control and yield and value of flue-cured tobacco. Tobacco International, 173(6), 33.