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- [4] INFRA-RED ABSORPTION SPECTRA OF COAL SPORES BULLETIN DE L ACADEMIE POLONAISE DES SCIENCES-SERIE DES SCIENCES GEOLOGIQUES ET GEOGRAPHIQUES, 1968, 16 (02): : 55 - &
- [6] THE INFRA-RED ABSORPTION SPECTRA OF COALS AND COAL EXTRACTS TRANSACTIONS OF THE FARADAY SOCIETY, 1945, 41 (4-5): : 279 - 288
- [10] THE INFRA-RED SPECTRA OF SOME DERIVATIVES OF SULPHUR HEXAFLUORIDE SPECTROCHIMICA ACTA, 1961, 17 (03): : 344 - 351