"Gov. Blagojevich Announces Major Opportunity Returns Investment to Bring Leading Manufacturer and 480 Jobs to Macomb". Illinois Government Network, February 22, 2005.
"Gov. Blagojevich Announces Major Opportunity Returns Investment to Bring Leading Manufacturer and 480 Jobs to Macomb". Illinois Government Network, February 22, 2005.
Joseph A. Schumpeter (2011). “The Theory of Economic Development: An Inquiry into Profits, Capital, Credit, Interest, and the Business Cycle”, p.19, Transaction Publishers