Riker, William H. <br/><br/>
An introduction to positive political theory / 
by William H. Riker and Peter C. Ordeshook. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1973. 
 - xii, 387 p. :  24 cm. 
 - Prentice-Hall contemporary political theory series .
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0134930649 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political science--Methodology.<br/>Political science--Mathematical models.