- Grolier Educational Corp., Danbury, Conn., c1986
- Grolier Educational Corp., New York, 1985?
- Grolier Educational Corp., New York, c1986
- Grolier Educational Corp., Danbury, Conn., c1995
- Grolier Educational Corp., S.l., c1986
- Grolier Educational Corp., New York, 1985
- Grolier Educational Corp., S.l., 1986?
- Grolier Educational Corp., New York, c1985