Additional file 12: of Petroleum hydrocarbon rich oil refinery sludge of North-East India harbours anaerobic, fermentative, sulfate-reducing, syntrophic and methanogenic microbial populations RoyAjoy SarPinaki SarkarJayeeta DuttaAvishek SarkarPoulomi GuptaAbhishek MohapatraBalaram PalSiddhartha KazySufia 2018 Table S4. Details of different hydrocarbon contaminated samples considered for comparative analysis. (DOCX 12 kb)