...There have been repeated efforts to discover, by measurements ofvarious kinds, further and more decisive differences which wouldserve as really scientific determinants of race...
W.E.B. Du Bois 「The Negro」
...To the three forms of marriage we can apply the determinants "regulated"and "unregulated," "permanent," as in the case ofpromiscuity...
Northcote W. Thomas 「Kinship Organisations and Group Marriage in Australia」
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