Loehlin, John C. <br/><br/>
Heredity, environment, & personality :  a study of 850 sets of twins / 
John C. Loehlin & Robert C. Nichols 
 - Austin :  University of Texas Press,  1976 
 - xii, 202 p. :  graphs ;  29 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 193-197 
<br/><br/><label>ISBN: </label>0292730039 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nature and nurture<br/>Personality<br/>Twins--Psychology