Kenny, David A. <br/><br/>
The measurement and explanation of population effects :  sex differences in mathematics and science in a longitudinal study / 
David A. Kenny 
 - London :  Northwestern University,  c1972. 
 - 114p. :  23 cm. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Population
<br/><br/><label>LC Class. No.: </label>HB848  / . 1972