Griffith, M.A., T. Spires, and P. Barclay, "Ontario Soil Baseline Survey, Analytical Data 1980-1981, Volume 3, Analytical Data for Northern Ontario", ARB-072-85-PHYTO, Ontario Ministry of the Environment, Toronto, Ont.
Griffith, M.A., T. Spires et P. Barclay, «Ontario Soil Baseline Survey, Analytical Data 1980-1981, Volume 3, Analytical Data for Northern Ontario», ARB-072-85-PHYTO, ministère de l'Environnement de l'Ontario, Toronto (Ont.) (1984).