Pengaruh tenperatur pada proses pencairan batubara banko selatan dan yallourn.

Impacts of low rank coal utilization in the coal fired power plant that was designed to use sub - bituminous coal

Masalah ketenagakerjaan di Indonesia : disusun dalam rangka 50 tahun Drs. Cosmas Batubara

The Prevalence of Reflux Esophgitis in the Elderly and its Associated Risk Factors/ Cosmas Rinaldi A Lesmana, Billy Angga, Levina S Pakasi, Waldemar Simandjuntak, Laurentius A Lesmana

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