Smoothey , Marion  <br/><br/>
Let's investigate quadrilaterals : 

 - Marshall :  New york ;   1993. 
 - 64 p ; 21cm .  01 
 - 2024-08-27 
<br/><br/><label>ISBN: </label>1854354590 
<br/><br/><label>Nat. Bib. No.: </label>0010072 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>SMO 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Universal Decimal Class. No.: </label>510