A-33 Citation: A-33. Auto/Steel Partnership, “Steel Bumper Systems for Passenger Cars and Light Trucks,” Sixth Edition, January 2019. Related Posts Filter by Post type Post Page Category Citations Sort by Title Relevance T-48 Citation 8 Y-15 Citation 8 X-2 Citation 8 W-39 8 W-12 8 U-13 Citation U-13. 8 T-47 Citation 8 T-46 8 N-26 8 M-70 8