[This document is a mirror by Erik Demaine of an old version of this page (go there for a more complete version). See also other flexagon papers.]
Antony S. Conrad 
              
and    
                       
Daniel K. Hartline
            
  
      
    
RIAS 
7212 Bellona Avenue 
Baltimoe 12, Maryland  
  
TR 62-11
  
  
May, 1962