This publication lists the 54 unrestricted Reports, 57 papers, 9 patents, and 4 Special Publications issued between September 1987 and December 1989. Also included are details of the periodicals currently issued by Mintek. These publications are additional to those listed in Special Publication no 10, 'Unrestricted Mintek publications 1966 to 1987', which lists the 3 hard-covered books, 1039 unrestricted Reports, 705 papers, 54 patents, 9 Special Publications, 2 Technical Bulletins, and 1 booklet that were issued as publications of the National Institute for Metallurgy (NIM) and the Council for Mineral Technology (Mintek) from 1966 (the year of NIM's inception) to 31st July, 1987.