Dispersal of viable row-crop seeds of commercial agriculture by farmland birds: implication for genetically modified cropsJohn L. Cummings, Levis W. Handley, Bruce Macbryde, Shelagh K. Tupper, Scott J. Werner and Zachary J. ByramEnviron. Biosafety Res., 7 4 (2008) 241-252DOI: https://doi.org/10.1051/ebr:2008021