1. Burns , P. Y. D. M. Christisen J. M. Nichols 1954 Acorn production in the Missouri Ozarks Univ. Mo. Agric. Exp. Stn. Bull. 611
2. Yield of seed by oaks in the Missouri Ozarks;Christisen;J. For.,1955
3. Collins , J. O. 1959 Oak mast boon to wildlife Louisiana Wildlife and Fisheries Comm. Wildlife Education Bull. 45
4. Yield and use by wildlife of acorns of water and willow oaks;Cypert;J. Wildl. Manage.,1948