. . "Technologie Ouvrages de vulgarisation." . . "Technology." . . . . . . "Pictorial works"@en . . . . . "Handbooks and manuals"@en . "The emphasis on on why and how things work and on the technology and operating principles involved." . . "How it works, illustrated by everyday devices and mechanisms" . . . "How it works"@en . . "How it works, illustrated: everyday devices and mechanisms" . "How it works, illustrated: everyday devices and mechanisms"@en . . . . . . . "Charts, diagrams, etc"@en . "Popular works" . "Popular works"@en . "How it Works, Illustrated : everyday devices and mechanisms" . "How it works : everyday devices and mechanisms"@en . . . . . . . . . . . . "How it works : illus; everyday devices & mechanisms"@en . "How it works, illustrated : everyday devices and mechanisms" . "How it works, illustrated : everyday devices and mechanisms"@en . . . . . . "Technology Popular works." . . "Popular science monthly." . .