"Enseignement programmé." . . "Enseignement programmé" . "Programmed instruction." . . "Teachers and machines; an introduction to the theory and practice of programmed learning" . "Teachers and machines; an introduction to the theory and practice of programmed learning"@en . . . . . . . "Teachers and machine" . . "Teachers and machines : an introduction to the theory and practice of programmed learning" . "Teachers and machines : an introduction to the theory and practice of programmed learning"@en . . "Teachers and Machines. An introduction to the theory and practice of programmed learning"@en . . . . . . . . "Teachers and machines" . "Teachers and machines"@en . . . . . . . . . . "Machines à enseigner." . . "Istruzione programmata Studi." . . "Teaching machines." . . "Didattica Mezzi elettronici." . . . .