Mamhot, Millard R. <br/><br/>
Plane & spherical trigonometry :   a tetrahedron approach / 
Dr. Millard R. Mamhot [and four others]. 
 - Intramuros, Manila :  Unlimited books library services and publishing,  2015. 
 - vi, 214 pages :  illustrations ;  23 cm 
<br/><br/> Includes References. 
<br/><br/><label>ISBN: </label>9789719654056 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plane -- Trigonometry.<br/>Spherical trigonometry.
<br/><br/><label>LC Class. No.: </label>QA 531   / .P6931 2015.