Ringenberg, Lawrence A. <br/><br/>
Informal geometry/ 
[by] Lawrence A. Ringenberg. 
 - New York:  Wiley,  [1967]. 
 - xi, 151 p.:  illus.,  25 cm. 
<br/><br/><label>LCCN: </label>67017347 
<br/><br/><label>Nat. Bib. No.: </label>GB67-17346 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry;
<br/><br/><label>Dewey Class. No.: </label>513  / R581i