//-->
Commodities
Martin, Peter G., (1979)
Commodity
(1998)
The Economics of Commodity Markets.
Chevallier, Julien, (2013)
The Executive at Work
Copeland, Melvin Thomas, (1951)
Marketing Problems
Copeland, Melvin Thomas, (1920)
Business statistics
Copeland, Melvin Thomas, (1921)