O. Helferich

STRATEGIC SOURCING: ACHIEVING SUPPLY CHAIN PERFORMANCE THROUGH BEST PRACTICES.

Lloyd Mitchell, O. Helferich, 1998 .

Integrating service-learning and humanitarian logistics education

Sean P. Goffnett, Omar Keith Helferich, Eric Buschlen, 2013 .

THE ROLE OF SECURITY IN THE FOOD SUPPLIER SELECTION DECISION

Cheri Speier, Roger J. Calantone, David J. Closs, 2009 .