Wolf, Artur <br/><br/>
Mathematik :  lehrbuch fur die 4. klasse / 
[verfasser Artur Wolf, Rudolf  Bittner]. 
 - Berlin:   Volk und Wissen Volkseigener,   1969.  
 - 176 p. :  ill. ;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching
<br/><br/><label>Dewey Class. No.: </label>372.7