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Johann Gutenberg & his invention of printing a coast-to-coast broadcast over the NBC blue network on August 4, 1940, in tribute to the printing industry, sponsored by the International Association of Printing House Craftsmen, upon the opening in San Francisco of its twenty-first annual convention
- "Johann Gutenberg & his invention of printing a coast-to-coast broadcast over the NBC blue network on August 4, 1940, in tribute to the printing industry, sponsored by the International Association of Printing House Craftsmen, upon the opening in San Francisco of its twenty-first annual convention"@en
- "Johann Gutenberg & his invention of printing; a coast-to-coast broadcast over the NBC blue network on August 4, 1940, in tribute to the printing industry, sponsored by the International Association of Printing House Craftsmen, upon the opening in San Francisco of its twenty-first annual convention"