1. Delohery, Pat D.; McLaughlin, Gerald W. “Pass-Fail Grading,” Office of Institutional Research Reports, Virginia Polytechnic Institute and State University, IV (7), September 27, 1971.
2. Galbreaith, D. “Non-Punitive Grading,” unpublished monograph, Division of Curriculum and Instruction, Virginia Department of Community Colleges, Richmond, Virginia, 1971.
3. Academic Attitudes and Performance as a Function of Differential Grading Systems