1. Encyclopedia of neuroscience 1;Wilson,1987
2. Sources of human psychological differences: the Minnesota study of twins reared apart;Bouchard;Science,1990
3. A theory of X-linkage of major intellectual traits;Lehrke;Am J Ment Defic,1972
4. X-linked mental retardation and verbal disability;Lehrke;Birth Defects,1994
5. Four hypotheses with a dearth of data: response to Lehrke's "A theory of X-linkage of major intellectual traits";Anastasi;Am J Ment Defic,1972