OPEN University of Sri Lanka <br/><br/>
Physics: sound 

 - Nugegoda  The Open University of Sri Lanka  1986 
 - 64 p. 
<br/><br/><label>ISBN: </label>139466 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sound
<br/><br/><label>Dewey Class. No.: </label>534  / OPE