"Fragetechnik." . . . . . . . . . . . . . . . "Sydney micro skills redeveloped : handbook"@en . . "Reinforcement, basic questioning, variability : handbook" . . . . . "Reinforcement, basic questioning, variability" . . "Reinforcement, basic questioning, variability"@en . . "Handbooks and manuals" . . "Reinforcement, basic questioning variability" . . . "Unterricht." . . . .