I Mech E conference pub. ; I Mech E Conference pub. ; 1 Mech E conference pub. ; I Mech E conference Pub. ; I Mech E conference pub ; I Mech E. Conference pub. ; I Mech E Conference Pub. ; I Mech Conference pub. ; I Mech E conference pub. 1980-7 I Mech E conference pub. 1981-9