Incoming Resources
- C. B. Slack, Thorofare, N.J., 1972
- C. B. Slack, distributed by Holt, Rinehart and Winston, Thorofare, N.J., New York, 1973
- Charles B. Slack, Inc., Thorofare, N.J., 1982
- SLACK, Distributed to the trade by Holt, Rhinehart and Winston, Thorofare, N.J., New York, N.Y., c1984