Ober Richard L <br/><br/>
Systematic observation of teaching : An interaction analysis-instructional strategy approach 

 - Englewood Cliffs    Prentice-Hall  1971 
 - xv,236p. 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching Technique