. . "American sociologist" . "Harrison Colyar White (born March 21, 1930) is the emeritus Giddings Professor of Sociology at Columbia University. White played an influential role in the \u201CHarvard Revolution\u201D in social networks and the New York School of relational sociology. He is credited with the development of a number of mathematical models of social structure including vacancy chains and blockmodels."@en . "1930Z"^^ . "White, Harrison"@en . "1930-03-21Z"^^ .