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2. Dominion Bureau of Statistics. 1966. Apparent per capita Domestic Disappearance of Foods in Canada. No. 32-226.
3. Residues in food and feed;Duggan;Pestic. Monit. J,1967
4. Acceptable daily intake of food additives and ceiling on levels of use;Hansen;Fd. Cos-met. Toxicol,1966
5. Pesticide Residues in the total diet in England and Wales. 1966-1967.1;Harries;Organization of a Total Diet Study. J. Sci. Fd. Agric.,1969