Clough-Smith, J. H.  <br/><br/>
An introduction to spherical trigonometry :   with practical examples, for students of navigation, hydrographic surveying and nautical astronomy /  
J. H. Clough-Smith.  
 - Glasgow :   Brown, Sons & Ferguson Ltd.,   c1978.  
 - viii,114 p. ;   22 cm.  
<br/><br/><label>ISBN: </label>085174320X  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Area of a spherical triangle. 
<br/><br/><label>Dewey Class. No.: </label>516.244  / CLO