"Sociale psychologie." . . "Humor." . . "Lach." . . "Riso (Psicologia)" . . "Psychische functies." . . . . "Laughter." . . "Laughter Psychology." . . . . . "The psychology of laughter : a study in social adaption" . "The Psychology of Laughter. A study in social adaptation"@en . . . . . . . "The Psychology of laughter" . . "Xiao de xin li xue" . . . . . . "The Psychology of laughter, a study in social adaptation, by Ralph Piddington" . . "The Psychology of laughter. A study of social adaptation"@en . . . . . . . . . . . . . "The psychology of laughter : A study in social adaptation" . "The psychology of laughter; a study in social adaptation"@en . . "The psychology of laughter : a study in social adaption by R.O. Piddington"@en . . . . "The psychology of laughter : a study in social adaptation"@en . "The psychology of laughter : a study in social adaptation" . . . . . . "The psychology of laughter a study in social adaptation"@en . "The psychology of laughter a study in social adaptation" . . . . . "笑的心理学" . . . . . . . . . . "笑的心理學" . "The psychology of laughter" . . . "Psicologia de la risa : un estudio sobre adaptición social" . . . "The Psychology of laughter : a study in social adaptation" . "The Psychology of laughter : a study in social adaptation"@en . "Psychology of laughter"@en . . . . "Comic, The." . . "Risa Psicología." . . "Psychologische aspecten." . . "Rire." . . "Rire Psychologie." . .