Continuum, and other types of serial order : 
Huntington, E. V. 
 - Mineola, N.Y. :  Dover Publications,  2003 
 - vii, 81 p. ;  23 cm. 
 - Dover phoenix editions .
<br/><br/> Originally published: 2nd ed. Cambridge, Mass. : Harvard University Press, 1917. 
<br/><br/><label>ISBN: </label>0486495507 (pbk.)