Analisis pengaruh sudut pengaruh injeksi udara terhadap panjang nyala api difusi bahan bakar propana pada burner gas tipe ejected combustor = Analysis of director angles influence of injection air to diffusion combustion flame length of propane fuel with''' ejected combustors" type" - Sihombing, Ombun, author (Fakultas Teknik Universitas Indonesia, 2008)