Lang, Douglas W.  <br/><br/>
Critical path analysis / 
Douglas W. Lang. 
 - London,   1977. 
 - ix, 215 p. ;  18 cm. 
<br/><br/><label>ISBN: </label>9780340212783 
<br/><br/><label>Subjects--Topical Terms: </label><br/>     Quantitative methods in social research
<br/><br/><label>Dewey Class. No.: </label>658.4032   / LAN