1. Determining Criticality of Rare Earth Elements in the Petroleum Refining Industry Open Access Author: Guelly, Kirsten Helene Title: Determining Criticality of Rare Earth Elements in the Petroleum Refining Industry Area of Honors: Energy, Business, and Finance Keywords: Rare Earth ElementsPetroleum RefiningFluid Catalytic Cracking CatalystsCriticality File: Download Guelly_Kirsten_DeterminingCriticality.pdf Thesis Supervisors: Antonio Nieto, Thesis SupervisorAndrew Nathan Kleit, Thesis Honors Advisor