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2. The dietary assessment of individuals; methods, accuracy, new techniques and recommendations;Bingham, S.A.;Nutr Abst Rev (Ser A),1987
3. Epidemiology for nutrionists: 4. Survey methods;Fehily, A.M.;Hum Nutr Appl Nutr,1983
4. A comparison of three dietary methods for estimating vitamin A intake;Russel-Briefel, R.; Caggiula, A.W.; Kuller, L.H.;Am J Epidemiological,1985
5. On determining trace element levels in man: the uses of blood and hair;Laker, M.;Lancet,1982