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The following texts were referenced in creating this content:
NMFC Freight Class Code List. (n.d.). Retrieved from http://shiptms.com/nmfc-freight-class-code-list/
Robinson, A. (2013, November 20). Freight Class: What is and How To Determine LTL Freight Class. Retrieved from http://cerasis.com/2013/11/20/freight-class/
Theissen, L. (2013, December 5). Freight Class Explained For LTL Shipments. Retrieved from http://www.freightpros.com/blog/freight-class-explained/