. . . . . . . . . "The technique of etching and engraving" . "The technique of etching and engraving"@en . . . . . "The Technique of etching and engraving" . . "The Technique of etching and engraving"@en . . . . "The technique of etching and engraving. [With illustrations.]"@en . . . . . . . . "The Technique of Etching and Engraving. [With illustrations.]"@en . . . . . . "The Techniques of Etching and Engraving"@en . . . . "Etching Technique." . . "Engraving Technique." . . "Gravure Technique." . . "Engraving and Engravings." . .