https://www.bgsu.edu/ncfmr/resources/data/family-profiles/lamidi-brown-manning-assortative-mating-racial-homogamy-fp-15-16.html
Most Recent Family Profile (FP-21-06) Homogamy in U.S. Marriages, 2019 Original Family Profile (FP-15-16) Assortative Mating: Racial Homogamy in U.S. Marriages,
assortative matingracialhomogamyumarriages