Lachlan, R. <br/><br/>
The elements of plane trigonometry / 
R. Lachlan and W. C. Fletcher 
 - London :  Edward Arnold,  [n.d.] 
 - viii, 164 p. ;  18 cm. 
 - Arnold's mathematical series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plane trigonometry<br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>514.5