Rowatt, Robert W. <br/><br/>
O.H.P. a guide to the use of the overhead projector 

 -  A scet production 
 - 20p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Education by projector
<br/><br/><label>Dewey Class. No.: </label>370  / ROW