. "Essentials of mechanical drafting elements, principles, and methods, with specific applications in working drawings of furniture, machine, and sheet metal construction; a manual for students, arranged for reference and study in connection with courses in manual training, industrial, high, and technical schools"@en . . . . . "Essentials of mechanical drafting : elements, principles, and methods with specific applications in working drawings of furniture, machine, and sheet metal construction" . . . "Essentials of mechanical drafting; elements, principles, and methods, with specific applications in working drawings of furniture, machine, and sheet metal construction; a manual for students, arranged for reference and study in connection with courses in manual training, industrial, high, and technical schools" . . . .