| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Greenberg's Guide to Marx Instruction Sheets | 978-0-89778-162-6 (0-89778-162-7) | 1992 | |
| Greenberg's Marx Toy Trains: Accessory Instructions and Packaging | 978-0-89778-116-9 (0-89778-116-3) | 1989 | Walter Check |