Ayres, Frank  , 1901-1994 <br/><br/>
Trigonometria 
/ Frank Ayres / coaut. Robert E. Moyer / trad. Maria Concepcion Ruiz Sanchez 
 - 2a ed 
 - Mexico  : McGraw-Hill  , c1991. 
 - 248 p. pb.  : il. 
<br/><br/><label>ISBN: </label>968-422-785-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometria esferica
<br/><br/><label>Dewey Class. No.: </label>514 AYR