Douglas, Evan J. <br/><br/>
Managerial economics :  theory, practice, and problems / 
Evan J. Douglas. 
 - Englewood Cliffs, N.J.  Prentice-Hall  1979. 
 - xv, 505 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographies and Index. 
<br/><br/><label>ISBN: </label>0135502365 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Managerial economics