books.google.co.uk - "In his Course in General Linguistics, first published in 1916, Saussure postulated the existence of a general science of signs, or Semiology, of which linguistics would form only one part. Semiology, therefore aims to take in any system of signs, whatever their substance and limits; images, gestures,...http://books.google.co.uk/books/about/Elements_of_Semiology.html?id=OVJhOA6iWxEC&q=language+and+speech&utm_source=gb-gplus-shareElements of Semiology
