Ardeni, Pier; Wright, Brian. <br/><br/>
The long-term behaviour of commodity prices. 

 - Washington :  World Bank,  1990. 
<br/><br/> Argues that the long-term net barter terms of trade between primary commodities and manufactures has been declining 0.6 percent a year. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commodity Prices.<br/>Commodities -- Commodity market.--Commodities -- Commodity market.