Learning addition. 

 - Princeton, NJ :  Video Tutor,  1993. 
 -  1 videodisc (VCD) ( 73 min) : sd., col. ; 4 3/4 in.  Math basic arithmetic; arithmetic series 1 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>VCD 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Addition<br/>Arithmetic
<br/><br/><label>LC Class. No.: </label>513.211 L47 c1993