Analisis terhadap implementasi undang-undang no. 1 tahun 1970 tentang keselamatan kerja di PT. Garuda Indonesia dan PERTAMINA = Analysis of implementation regulation of act no. 1 of 1970 concerning occupational safety at PT. Garuda Indonesia and Pertamina - Siahaan, Tumbur Saut P., author (Universitas Indonesia, 2002)