1. Anonymous (1979) Ontario Ministry of Agriculture and Food, 1979 Field Crop Recommendations, Publication 296, Parliament Buildings, Queen's Park, Toronto, Ontario, Canada
2. -(1977) International Reference Group on Great Lakes Pollution from Land Use Activities. Quality Control Handbook for Pilot Watershed Studies, Internat Joint Commission, Windsor, Ontario, Canada
3. -(1978) Environmental management strategy for the Great Lakes system. Pollution from Land Use Activities Reference Group (PLUARG). Final Report International Joint Commission, Windsor, Ontario, Canada
4. -(1981?1985) Environment Canada, Water Survey of Canada, Inland Waters and Lands Directorate, Water Resources Branch, Water Survey of Canada, Ottawa, Canada
5. Beste LE (ed) (1983) Herbicide Handbook, Fifth edition, Weed Sci Society of Am, Champaign, Illinois