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- [23] 1ST INTERNATIONAL-CONFERENCE ON ENVIRONMENTAL MUTAGENS IN HUMAN-POPULATIONS AT RISK - CAIRO, 1992 - PREFACE MUTATION RESEARCH, 1992, 272 (01): : 81 - 82
- [24] 1ST TUBINGEN SYMPOSIUM ON OCCUPATIONAL-MEDICINE - PROBLEMS OF STRESS AT THE MODERN WORKPLACE - FEBRUARY 15-16, 1991 ARBEITSMEDIZIN SOZIALMEDIZIN PRAVENTIVMEDIZIN, 1991, 26 (10): : 399 - 400
- [25] 1st Vishnevskii Readings International Academic Conference (National Research University Higher School of Economics, 14-15 May) NOVOE LITERATURNOE OBOZRENIE, 2020, (164): : 429 - 434
- [28] SELECTED PAPERS OF THE 1ST WORLDWIDE WEB CONFERENCE 25-27 MAY, GENEVA, SWITZERLAND - PREFACE COMPUTER NETWORKS AND ISDN SYSTEMS, 1994, 27 (02): : R3 - R3