Wiltshire, Alan. <br/><br/>
Three dimensions and impossible solids / 
by Alan Wiltsire. 
 - Essex :  Claire Publications,  1992. 
 - 60 p. : ;  29 cm. 
<br/><br/><label>ISBN: </label>1871098173 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry.<br/>Hexagons.<br/>Triangles.