1. Effect of vitamin and mineral supplementation on intelligence of a sample of schoolchildren;Benton, D.; Roberts, G.;Lancet,1988
2. Vitamin/mineral supplementation and non-verbal intelligence;Emery, P.W.; Nelson, M.; Saunders, T.A.B.;Lancet,1988
3. Vitamin/mineral supplementation and non-verbal intelligence;Hutton, J.L.; Ashby, D.;Lancet,1988
4. Vitamin/mineral supplementation and non-verbal intelligence;Yudkin, J.;Lancet,1988
5. Vitamin/mineral supplementation and non-verbal intelligence;Bates, C.J.; Thurnham, D.I.; Powers, H.J.;Lancet,1988