Unpublished Supplementary Proceedings of the 1994 International Workshop on Higher Order Logic theorem proving and its applications, Valletta, Malta.
@UNPUBLISHED{harrison-slind,
author = "John Harrison and Konrad Slind",
title = "A Reference Version of {HOL}",
note = "Presented in poster session of 1994 HOL Users
Meeting and only published in participants'
supplementary proceedings. Available on the Web from
{\verb+http://www.dcs.glasgow.ac.uk/~hug94/sproc.html+}",
year = 1994}