Waples, Douglas, 1893 <br/><br/>
Research methods and teacher's problems: a manual for systematic studies of classroom procedures 

 - New York  MacMillan  1930 
 - xxiii,653p.  20cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching
<br/><br/><label>LC Class. No.: </label>LB1025.W33