Mamhot, Millard R. <br/><br/>
Plane & spherical trigonometry:  a tetrahedron approach/ 
Millard R. Mamhot...[and 4 others]. 
 - Intramuros, Manila:  Unlimited Books Library Services and Publishing Inc.,  c2015. 
 - vi, 214 pages;  23 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>978-971-9654-05-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.<br/>Plane trigonometry.<br/>Spherical trigonometry.
<br/><br/><label>Dewey Class. No.: </label>DFil 516.242  / M31p