Afifi, A. A. <br/><br/>
Thoughts on the experimental design for the health insurance experiment / 
A. A. Afifi 
 - California :  Rand Corporation,  1972 
 - 9 pages ;  28 cm. 
 - The Rand paper series ;  p. 4892 .
 - Rand paper series ;  p. 4892 .
<br/><br/>Includes bibliographical references.