| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Gold refiners & bars worldwide: An international register of the gold bars, industrial products, and services of refiners and smelters accredited to important gold associations and exchanges | 978-O-646-O315O-7 (O-646-O315O-3) | 1991 |
Nigel - Design. Smith, Bill - Development and Editing Findley