Specimens illustrating the shale oil industry
Specimens illustrating the shale oil industry, viz:- "Curly" bituminous shale, "Plain" bituminous shale, Residual carbon from distillation of crude oil
Specimens illustrating the shale oil industry, viz:- "Curly" bituminous shale, "Plain" bituminous shale, Residual carbon from distillation of crude oil