Mager, Robert F. <br/><br/>
Preparing instructional objectives / 
Robert F. Mager. 
 - 2nd ed. 
 - Belmont, CA :  Fearon Publ.,  1975. 
 - 136 p. 
<br/><br/><label>ISBN: </label>0-8224-5601-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic