Wells, William C., Jr. <br/><br/>
Trigonometry  : formulas, relations of functions and solution of right and oblique triangles 

 - Philadelphia :  LETAX,  1916 
 - 1 hoja suelta 
<br/><br/><label>LCCN: </label>53494 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometría.