Hart, William L <br/><br/>
Plane trigonometry / 
Hart, William L 
 -  D C Heath & Co., Boston,  1933 
 - p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry; Mathematics
<br/><br/><label>Dewey Class. No.: </label>516.24 HAR-P