References
- Garn , S. M. , Smith , N. J. and Clark , D. C. 1974 . Race differences in hemoglobin levels. . Ecol. Food Nutr. , 3 : 299 – 301 .
- Garn , S. M. , Smith , N. J. and Clark , D. C. 1975a . Lifelong differences in hemoglobin levels between blacks and whites. . J. Natl. Med. Assoc , 67 : 91 – 96 .
- Garn , S. M. , Smith , N. J. and Clark , D. C. 1975b . The magnitude and implications of apparent race differences in hemoglobn values. . Am. J. Clin. Nutr. , 28 : 563 – 568 .
- Garn , S. M. , Clark , D. C. and Guire , K. E. 1976 . Husband‐wife similarities in hemoglobin levels. . Ecol. Food Nutr. , 5 : 47 – 50 .
- Niswander , K. R. and Gordon , M. 1972 . The Women and Their Pregnancies , Philadelphia : W. B. Saunders Co. .
- Wingerd , J. , Christianson , R. , Lovitt , W. V and Schoen , E. J. in press . Placental ratio in white and black women: relations to smoking and anemia. . Am. J. Obstet. Gynecol. ,