1. U.S. Census Bureau Statistics for industry groups and industries: 2005 M05(AS)-1 2006
2. Center for Advanced Purchasing Studies Cross-industry metric report 2008
3. The talent factor in purchasing;Reinecke;McKinsey Q,2007
4. Identifying and evaluating Chinese suppliers: China sourcing practices of german manufacturing companies;Hedderich;Practix,2006
5. Boeing's nuts-and-bolts problem; Shortage of fasteners tests ability to finish dreamliners;Lunsford;Wall Street J,2007