Ayres, Frank  , 1901-1994 <br/><br/>
Teoria y problemas de trigonometria plana y esferica 
/ Frank Ayres / trad. Antonio Linares 
 - Mexico  : McGraw-Hill  , c1982. 
 - 203 p. enc.  ; 50 
<br/><br/><label>ISBN: </label>968-451-176-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometria
<br/><br/><label>Dewey Class. No.: </label>REF 514 AYR