Hayden, Alice Hazel,  1909- <br/><br/>
Systematic thinking about education / 
by Alice H. Hayden and Gerald M. Torkelson. 
 - Indiana :  Phi Delta Kappa Educational Foundation,  1973. 
 - 34 p. : ports ; 18 cm. 
 - PDK fastbacks, 17. .
<br/><br/>Bibliography: p. 34. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational technology.