"Lee Willerman"@en . . . . "1997Z"^^ . "1997-01-10Z"^^ . "American psychologist" . . "Lee Willerman (26 July 1939 \u2013 10 January 1997) was an American psychologist known for his work on behavioral genetics using twin studies."@en . "Willerman, Lee"@en . . "1939-07-26Z"^^ . . "1939Z"^^ .