Rietz, H. L. <br/><br/>
Plane and spherical trigonometry / 
by H.L. Rietz, J.F. Reilly and Roscoe Woods. 
 - Rev. ed. 
 - New York :  MacMillan,  [1945] 
 - Series of mathematical texts .
<br/><br/> First published 1936. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.<br/>Mathematics.