Rosenbach, Joseph B. <br/><br/>
Essentials of plane trigonometry 

 - Boston  GINN and company  1950 
 - Varies 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonomety. plane
<br/><br/><label>Dewey Class. No.: </label>514.5  / R72E