CAVALLO, Roger .E <br/><br/>
The role of systems methodology in social science research / 
Roger E. Cavallo 
 - Boston  Martin Nijhoff Publishing  c1979 
 - ix, 202p.:  ill.; 
<br/><br/> include index 
<br/><br/><label>ISBN: </label>0898380057 
<br/><br/><label>Dewey Class. No.: </label>300.18 CAV