The Cambridge Encyclopedia of Space : Missions, Applications and Exploration Verger, Fernand Ghirardi, Raymond , Paris) Sourbes-Verger, Isabelle 9780521773003 Innbundet 21.08.2003 Engelsk Produseres på bestilling
Comet Science : The Study of Remnants from the Birth of the Solar System Crovisier, Jacques Encrenaz, Therese 9780521645911 Heftet 09.03.2000 Engelsk Midlertidig utsolgt
