TY - CONF A1 - Barthelmeß, Helmut T1 - Rules and Principles of Thesaurus Work in the Study Group "Thesaurus and Exchange of Abstracts" (SG-TEA) T2 - Document / International Institute of Welding PY - 1977 IS - SG-TEA-18-77 SP - 1(?) EP - 3(?) CY - London AN - OPUS4-8792 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -