Orbell, S. F. W. <br/><br/>
Pre-school opportunity and sex differences as factors affecting educational progress / 
S.F.W. Orbell, D.J. Freer, Elizabeth Hendrikz. 
 - Salisbury :  University of Rhodesia,  1973. 
 - Series in education : occasional paper ;  no. 2 .
<br/><br/>Bibliography: p. 30. 
<br/><br/><label>ISBN: </label>0869240021 
<br/><br/><label>LCCN: </label>76365499 //r91 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education, Preschool.<br/>Education, Primary.<br/>Sex discrimination in education.
<br/><br/><label>LC Class. No.: </label>LB1140.2  / .O72 
<br/><br/><label>Dewey Class. No.: </label>372.2/1