Evidence for a low upper limit of heritability of mental test performance in a national sample of twins
1982 ◽
Vol 3
(3)
◽
pp. 237-247
◽
1988 ◽
Vol 80
(2)
◽
pp. 217-233
◽
Keyword(s):
1977 ◽
Vol 69
(6)
◽
pp. 697-701
◽