organised by [the] Association aéronautique et astronautique de France, Royal Aeronautical Society ... [et al.] ; [edited by T.D. Guyenne & J.J. Hunt]European Space Agencyc1994
co-sponsored by Bundesministerium für Forschung und Technologie (BMFT) ... [et al. ; edited by Valerie David and Norman Longdon]European Space Agencyc1988