References
- Association of Vitamin Chemists Inc. 1966 . Methods of Vitamin Assay, , 3rd Ed. , London : Interscience Publishers .
- Edozien , J. C. 1965 . Establishment of a biochemical norm for the evaluation of nutritional status in West Africa . J. West Afr. Sc. Assn. , 10 : 3 – 21 .
- F.A.O. 1968 . Food Composition Table for Use in Africa. , Rome, Washington D.C. : Food and Agriculture Organization; U.S. Department of Health Education and Welfare .
- Hauck , H. M. 1961 . Dietary study of a Nigerian Secondary School . J. Amer. Diet. Assn. , 39 : 467 – 472 .
- Horwitt , M. R. , Harvey , C. C. , Hills , O. W. and Liebert , E. 1950 . Correlation of urinary excretion of riboflavin with dietary intake and symptoms of ariboflavinosis. . J. Nutr. , 41 : 247 – 264 .
- Horwitt , M. K. 1966 . Nutritional requirements of man with special reference to riboflavin. . Amer. J. Clin. Nutr. , 18 : 458 – 466 .
- ICNND . 1967 . Nutrition Survey, Republic of Nigeria. , Washington D.C. : Interdepartmental Committee for Nutrition and National Defense, U.S. Dept. of Health Education and Welfare .
- Oldham , H. , Lounds , E. and Porter , T. 1947 . Riboflavin excretions and test dose returns of young women during periods of positive and negative nitrogen balance. . J. Nutr. , 34 : 69 – 79 .
- Pearson , W. N. 1967 . Blood and urinary vitamin levels as potential indices of body stores. . Amer. J. Clin. Nutr. , 20 : 514 – 525 .
- Pollack , H. and Bookman , J. J. 1951 . Riboflavin excretion as a function of protein metabolism in the normal, catabolic and diabetic human being. . J. Lab. Clin. Med. , 38 : 561 – 573 .
- Rama , Sastri , B. U. , Mukundan , R. and Patwardhan , V. N. 1950 . Studies on the urinary excretion of riboflavin and thiamine in Indian adults. . Ind. J. Med. Res. , 38 : 213 – 233 .