Computer security : the practical issues in a troubled world : proceedings of the Third IFIP International Conference on Security, IFIP/Sec '85, Dublin, Ireland, 12-15 August, 1985 - Grimson, Jane B.; Kugler, Hans-Jürgen (North-Holland ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1985)