Clark, John R. <br/><br/>
Plane geometry :   constructions, locus, ratio and proportion, poiygons, and geometry in aeronautics / 
John R. Clark & Rolland R. Smith 
 - Washington, D. C. :  World book com.,   1944 
 - vi, 242 p. :   ill. ;  16 cm.  
 - War department education manual ;  EM 307 .
 - War department education manual ;  EM 307 .
<br/><br/> Include index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Plane.
<br/><br/><label>Dewey Class. No.: </label>516.22  / CLP 1944