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- Beckers, Helmut [remove] 77
- Chemistry -- Periodicals 64
- 540 62
- 540.5 6
- Chemistry, Physical and theoretical -- Periodicals 4
- Chemistry -- Abstracts -- Periodicals 3
- Chemistry, Inorganic -- Periodicals 3
- 541.3 2
- 546.05 2
- Azide -- Cyanide -- Cyanoform -- Ketenimine -- Reaktive Zwischenstufen 2
- Brønsted acids -- Lewis acids -- pentafluoroorthotellurates -- superacids -- weakly coordinating anions 2