| Year | 1971 |
| Date | 02-Apr |
| Volume | 137 |
| Issue | 3,414 |
| Page | 327 |
| Category | General |
| Part | 6 |
| Title | Metallurgy in Model Engineering |
| Author | M.Woodington |
| Notes | Metallurgical characteristics of the additions, commercial free-cutting alloys, mild steel, stainless steel, copper alloys, brass, bronze |