共 25 条
- [21] EULER CHARACTERISTICS OF 2-MANIFOLDS AND LIGHT OPEN MAPS - PRELIMINARY REPORT NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1971, 18 (05): : 784 - &
- [22] DETERMINATION OF ISOTOPY GROUP OF CERTAIN CONTRACTIBLE OPEN 3-MANIFOLDS - PRELIMINARY REPORT NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1974, 21 (01): : A227 - A227
- [23] SPACES DEFINED BY SEQUENCES OF OPEN COVERS WHICH GUARANTEE THAT CERTAIN SEQUENCES HAVE CLUSTER POINTS - PRELIMINARY REPORT NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1972, 19 (01): : A25 - &
- [24] PRELIMINARY REPORT ON DETECTION AND QUANTITATION OF OPIATES AND CERTAIN OTHER DRUGS OF ABUSE AS TRIMETHYLSILYL DERIVATIVES BY GAS-LIQUID CHROMATOGRAPHY JOURNAL OF THE FORENSIC SCIENCE SOCIETY, 1970, 10 (01): : 17 - &