Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.
Ed. ESF (Collection Communication et Complexité) Paris, 1989 199 p.
Presses Polytechnique et Universitaires romandes (Lausanne -Suisse), 1990, 190 pages.