W T Wilkinson

• Photo-Engraving, Photo-Etching, and Photo-Lithography in Line and Half-Tone
• Photo-engraving, Photo-etching, and Photo-lithography in Line and Half-tone; Also, Collotype and Heliotype
• Photo-Mechanical Processes, a Practical Guide to the Production of Letterpress Blocks in Line and in Tone, Photo-Lithography in Line and Tone, Collotype, and Photogravure