Penrose, L. S.  1898-1972 <br/><br/>
The biology of mental defect / 
by L. S. Penrose ; with a preface by J. B. S. Haldane, completely revises with the assistance of J. M. Berg and Helen Lang-Brown 
 - 4th ed. 
 - London :  Sidgwick & Jackson,  1966 
 - 374 p. :  ill. ;  23 cm. 
<br/><br/>Bibliography : p. 405-413 
<br/><br/><label>ISBN: </label>0283352655 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medical genetics<br/>Mental retardation
<br/><br/><label>National Library of Medicine Call No.: </label>WM300  / .P417b 1972 9