Nat. council of teachers of mathematics. <br/><br/>
Geometria informal. 

 - 1 Ed. 
 - Mexico   Trillas    1975. 
 - 84p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometria.I .Colec. Temas de matematicas.n. 14.
<br/><br/><label>LC Class. No.: </label>QA461  / .G36 1970