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- [1] TRACE-ELEMENTS IN COAL AND THEIR POTENTIAL FOR ENVIRONMENTAL-POLLUTION ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1979, (APR): : 274 - 274
- [3] NEUROPSYCHIATRIC ASPECTS OF TRACE-ELEMENTS BRITISH JOURNAL OF HOSPITAL MEDICINE, 1985, 34 (06): : 361 - &
- [4] ENVIRONMENTAL-HEALTH HAZARD ASPECTS OF TRACE-ELEMENTS IN AIR JADERNA ENERGIE, 1977, 23 (08): : 304 - 305
- [5] TRACE-ELEMENTS IN THE KARLOVO COAL DEPOSIT DOKLADI NA BOLGARSKATA AKADEMIYA NA NAUKITE, 1991, 44 (11): : 67 - 70
- [6] OCCURRENCE AND DISTRIBUTION OF TRACE-ELEMENTS IN COAL ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1976, 172 (SEP3): : 58 - 58
- [7] PRECISION ON THE DETERMINATION OF TRACE-ELEMENTS IN COAL ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1979, (APR): : 52 - &
- [10] TRACE-ELEMENTS IN KOSOVAS BASEN COAL ERDOL & KOHLE ERDGAS PETROCHEMIE, 1983, 36 (09): : 428 - 428