The University of Oklahoma Libraries’ 5th Floor Special Collections (BL5) encompass four areas: • History of Science Collections • William Bennett Bizzell Bible Collection • Harry W. Bass Business History Collection • John and Mary Nichols Rare Books and Special Collections. All of these collections are held on the 5th floor of Bizzell Memorial Library. All books, papers, and artifacts in these collections are accessed in the Duane H. D. Roller Reading Room, also located on the 5th floor. These policies and procedures apply to all four of the collections.