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- [22] PROCEEDINGS OF THE 145TH SYMPOSIUM OF THE INTERNATIONAL-ASTRONOMICAL-UNION, HELD IN ZLATNI-PJASACI (GOLDEN-SANDS), BULGARIA, AUGUST 27-31, 1990 - INTRODUCTION IAU SYMPOSIA, 1991, (145): : 1 - 2
- [24] 12TH INTERNATIONAL OZONE SYMPOSIUM, DRESDEN, 9 TO 17 AUGUST 1976 ZEITSCHRIFT FUR METEOROLOGIE, 1978, 28 (04): : 250 - 251
- [25] 10TH INTERNATIONAL-SYMPOSIUM ON NONLINEAR ACOUSTICS - KOBE, JAPAN, JULY 1984 JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1985, 77 (01): : 325 - 326
- [28] PROCEEDINGS OF THE 145TH SYMPOSIUM OF THE INTERNATIONAL-ASTRONOMICAL-UNION, HELD IN ZLATNI-PJASACI (GOLDEN-SANDS), BULGARIA, AUGUST 27-31, 1990 - CONCLUDING REMARKS IAU SYMPOSIA, 1991, (145): : 447 - 450
- [29] INTERNATIONAL-SYMPOSIUM ON MYOCARDIAL PRESERVATION - AUGUST 12-15, 1990 OXFORD, ENGLAND - INTRODUCTION ANNALS OF THORACIC SURGERY, 1991, 52 (04): : 902 - 902
- [30] 12TH INTERNATIONAL-SYMPOSIUM ON CHROMATOGRAPHY, SEPT 25-29, 1978 - FOREWORD JOURNAL OF CHROMATOGRAPHY, 1978, 167 (DEC): : R9 - R9