Arner, 1963. J. Wildlife Management, 27 (1): 76-81 Document reference Arner, D. H., 1963. Production of duck food in beaver ponds. J. Wildlife Management, 27 (1): 76-81Web https://doi.org/10.2307/3797780Citation key Arner, 1963Datasheets Cockspur grass (Echinochloa crus-galli) grain
