G.M. · George M. · Mappin George
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| EPNS and Old Sheffield Plate Makers' Marks, 1758-1943 | 978-0-572-02419-2 (0-572-02419-3) | 1999 |
| EPNS: Electroplated Nickel Silver Old Sheffield Plate and Close Plate Makers' Marks from 1784 | 978-0-572-03190-9 (0-572-03190-4) | 2006 |