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- [3] ON VITAMINS IN SEWAGE SLUDGE .3. VITAMIN-B12 ACTIVITY OF DIFFERENT TYPES OF SEWAGE SLUDGE ACTA CHEMICA SCANDINAVICA, 1955, 9 (05): : 803 - 806
- [6] ON VITAMINS IN SEWAGE SLUDGE .5. THE EFFECT OF ANTIBIOTICS ON VITAMIN-B12 CONTENTS OF MICROBIALLY DECOMPOSING SEWAGE SLUDGE ACTA CHEMICA SCANDINAVICA, 1957, 11 (07): : 1191 - 1200
- [8] ON VITAMINS IN SEWAGE SLUDGE .12. PRODUCTION OF VITAMIN-B12 BY CERTAIN CLOSTRIDIA ACTA CHEMICA SCANDINAVICA, 1960, 14 (01): : 43 - 47
- [9] ACTIVATED SLUDGE AS A SOURCE OF VITAMIN-B12 FOR ANIMAL FEEDS SEWAGE AND INDUSTRIAL WASTES, 1952, 24 (01): : 38 - 44
- [10] ON VITAMINS IN SEWAGE SLUDGE .9. PRODUCTION OF VITAMIN-B12 BY METHANE BACTERIA ACTA CHEMICA SCANDINAVICA, 1959, 13 (07): : 1453 - 1459