Cessna et al., 2002
Cessna, A. J., Darwent, A. L., Townley-Smith, L., Harker, K. N., & Kirkland, K.; "Residues of glyphosate and its metabolite AMPA in field pea, barley and flax seed following preharvest applications;" Canadian Journal of Plant Science, 2002, 82(2), 485-489; DOI:…