by Barnes, Richard J.H.
Published in Space policy (01.08.1991)

by Barnes, Richard J.H.
Published in Space policy (1991)

by Barnes, Richard J.H.
Published in Acta astronautica (01.07.1993)

by Barnes, Richard J.H., Clapp, Jennifer
Published in Space policy (01.11.1995)

by Barnes, Richard J.H.
Published in Space policy (01.05.1991)

by BARNES, RICHARD J. H., de VOS, PETER JON, PRYKE, IAN W., FUQUA, DON
Published in Issues in science and technology (01.10.1988)