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- [4] THE INFRA-RED SPECTRUM OF GASEOUS SULPHUR TRIOXIDE SPECTROCHIMICA ACTA, 1963, 19 (06): : 931 - 935
- [7] A new emission spectrum of sulphur in the photographic infra-red COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES, 1935, 201 : 597 - 598