Hutcheson, Thomas L.; Porter, Richard C. <br/><br/>
The Cost of tying aid: a method and some Colombian Estimates 

 -  Princeton University  1972 
 - 53 p.  See PRI 332.042 OLI (Includes Acc. Nos. 3366, 3367, 3524 & 3523) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COSTING