| Results | ||
| Speaker | Title | Date |
| Staehle, H.C. | A Simplified System of Color Printing | 1952 |
| Staehle, H.C. | Recent Developments In Lithography Printing Processes | 1950 |
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| Results | ||
| Speaker | Title | Date |
| Staehle, H.C. | A Simplified System of Color Printing | 1952 |
| Staehle, H.C. | Recent Developments In Lithography Printing Processes | 1950 |