TY - BOOK ID - 819195 TI - Organization, functioning and activities of national documentary information systems in the scientific, technical and economic fields PY - 1973 SN - 0080177255 PB - Bucharest DB - UniCat KW - Information retrieval UR - https://www.unicat.be/uniCat?func=search&query=sysid:819195 AB - ER -