Hall, Henry Sinclair <br/><br/>
Elementary trigonometry 
Henry Sinclair Hall, S. R. Knight 
 - London  MacMillan and Company  1946 
 - xv,415p.  ill.  18cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plane trigonometry
<br/><br/><label>LC Class. No.: </label>MATH QA533.H22