Curtiss, David R. <br/><br/>
Essentials of trigonometry with applications / 
David R. Curtiss and Elton J. Moulton. 
 - Boston :  D.C.  Heath, and Company,  c1942. 
 - 94 p. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>LC Class. No.: </label>916692559 
<br/><br/><label>Dewey Class. No.: </label>Cir 516 C94 1942