by Harden, EH, Bance, UR
Published in Vacuum (01.01.1966)

by Bance, UR, Harden, EH
Published in Vacuum (1966)

by Bance, UR, Drummond, IW, Finbow, D, Harden, EH, Kenway, P
Published in Vacuum (1978)

by Bance, U.R., Harden, E.H.
Published in Vacuum (01.01.1965)

by D Craig, R, H Harden, E
Published in Vacuum (01.01.1966)