Installation of optical projection equipment in educational establis hments. 

 - London,    n.d. 
 - 52 p. :    ill. ;    21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> School buildings.<br/> Optical materials.
<br/><br/><label>Dewey Class. No.: </label>371.339