Keeler, Emmett <br/><br/>
Simultaneous estimation of teacher mobility and reading scores / 
Emmett Keeler, John McCall 
 - California :  Rand Corporation,  1972 
 - 4 pages ;  28 cm. 
 - The Rand paper series ;  p. 4927 .
 - Rand paper series ;  p. 4927 .