Proceedings of the 6th British Robot Association Annual Conference / Proceedings of the 6th international modal analysis conference / British Robot Association annual conference. Proceedings of the 7th international modal analysis conference / proceedings of the 1978 Joint Automatic Control Conferences. Proceedings of the 21st american towing tank conference / Proceedings of the 26th annual technical conference. Proceedings of the 6th China international pipeline conference Proceedings of the national electroics conference / Proceedings of the ACM, annual conference :