FORUM: Petite bibliographie sur la communication non verbale dans le monde arabe

Dear all, do you konw any reilable book which analizes the gestures in Egypt/ Cairo ? I am a Ph.D. student in Linguistics with a thesis in Sociolinguistics. I am looking for books or articles that analizes how people in Cairo express negation (no) through non verabl communication / gestures. Thank you a lot in advance, Elena (elenacanna hotmail.com)