Sinden, John.A. Worrell, Albert.C. <br/><br/>
Unpriced Values :  Decisions without Market Prices. 

 - 1st, ed. 
 - Canada :  A wiley interscience,  1979. 
 - 511 p. 
<br/><br/><label>ISBN: </label>0471027421 
<br/><br/><label>Dewey Class. No.: </label>338.5  / SIN