Morrison, Peter A. <br/><br/>
Uses of the social security work history sample in studying metropolitan migration / 
Peter A. Morrison 
 - California :  Rand Corporation,  1972 
 - 9 pages ;  28 cm. 
 - The Rand paper series ;  p. 4869 .
 - Rand paper series ;  p. 4869 .
<br/><br/>Includes bibliographical references.