Kroll, Virginia <br/><br/>
Equal shmequal / 
Virginia Kroll 
 - Watertown, MA  Charlesbridge  2005 
 - 32 p.  col. ill.  24 cm. 
<br/><br/><label>ISBN: </label>9781570918926 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural sciences and mathematics