The Harris Matrix was invented in 1973 by Dr. Edward C. Harris and for the first time provided archaeologists with a means to view stratigraphic sequences in diagram form. It has since been adopted by professionals worldwide.
I picked this link up off the blog of Israeli archaeologist, Aren Maier, who is working on excavations at Tel es Safi (Gath). The book is being given away to anyone who wants to download it.