LEARNING ABOUT SOUND [VIDEOGRABACION] 

 - 2 
 - MEXICO:   ENCYCLOPAEDIA BRITANNICA  EDUCATIONAL CORP.  1974 
 - 1 VIDEO (VHS) (16M) COL. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1.VELOCIDAD DEL SONIDO.<br/>2.VIBRACION.<br/>3.ONDAS SONORAS.
<br/><br/><label>Dewey Class. No.: </label>C 620.21 E23