Computers in developing nations : a one-day international seminar : proceedings of the IFIP TC-9 International Seminar on Computers in Developing Nations, Melbourne, Australia, 13 October, 1980 - IFIP International Seminar on Computers in Developing Nations (1980 : Melbourne) (North-Holland, Sole distributors for the U.S.A. and Canada, Elsevier North-Holland, 1981)