A special head to tail edition of 4 Taxis Magazine titled "''Perpendiculaire,'' (series of 2)." Edited by Françoise Aphesbero, Michel Aphebero and Danielle Colomine. One side features 16 pages designed by Martin Kippenberger and Jiri Georg Dokoupil titled "Homme Atelier Peinture a Cologne." The other side is a feature on the Lascaux caves. Text in English and French.