OLENDER, Robert. “A Legacy of Limitation: Thomas M. Cooley, Public Purpose, and the General Welfare,” 33:1, 1-26.
OLENDER, Robert. “People vs. Profs: How a Conflict between Traditional and Homeopathic Medicine Nearly Destroyed the University of Michigan,” 45:2, 77-101.
OLSON, Gordon. “Local History Department: Grand Rapids Public Library,” 26.1, 145-148.

O'NEILL, Sean. "The Rebranding of Jonathan Walker," 46:1, 121-165.
ORTQUIST, Richard T. “The Perils of Victory: Michigan Democrats in the Wake of 1932,” 17:2, 21-33.
OWENS, Jack N. “A Long-Overdue Evaluation of Benjamin Hough's Observation for Latitude of the North Cape of Maumee Bay, Ohio's Northern Border,” 44:2, 97-124.