Gundlach, Bernard H. <br/><br/>
Discovery in Mathematics. 

 - 1st Ed. 
 - California :  Laidlaw Brothers Publishers,  1972. 
 - 352 p. 
<br/><br/><label>ISBN: </label>0844514950 
<br/><br/><label>Dewey Class. No.: </label>510  / DIS