Palmer , Claude Irwin. <br/><br/>
Plane and Spherical Trigonometry /  Textual Documents 
Claude Irwin Palmer & Charles Wilber Leigh. 
 - 4th ed. / 
 - New York :  McGraw - Hill book company ,  1934. 
 - xiv,229p. ;  23cm. 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Trigonometry Spherical Trigonometry Plane Trigonometry G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>514.6  / P 182 P