Cost benefit and cost effectivenes :  studies and analysis / 
ed. by J. N. Wolfe. 
 - London :  G. Allen & Unwin,  1973. 
 - 236 p. 
 - Unwin University books .
<br/><br/><label>ISBN: </label>004338059X 
<br/><br/><label>Encabezamiento--Tema: </label><br/>Eficiencia de costos