1984, first half

Dwarf (A. K. Dewdney) 1984-05 [Scientific American] stone
Gemini (A. K. Dewdney) 1984-05 [Scientific American] other
Imp (A. K. Dewdney) 1984-05 [Scientific American] imp
Juggernaut (A. K. Dewdney) 1984-05 [Scientific American] other