Mueller et al., 2002. Wetlands, 22 (1): 170-178 Document reference Mueller, M. H., van der Valk, A. G., 2002. The potential role of ducks in wetland seed dispersal. Wetlands, 22 (1): 170-178Web https://doi.org/10.1672/0277-5212(2002)022[0170:TPRODI]2.0.CO;2Citation key Mueller et al., 2002Datasheets Cockspur grass (Echinochloa crus-galli) grain