作者:(加)Petroleum Society of the Canadian Institute of Mining Proceedings/Metallurgical Society of the Canadian Institute of Mining and Metallurgy ; Proceedings / Metallurgical Society of the Canadian Institute of Mining and Metallurgy ; Proceedings / the Metallurgical Society of the Canadian Institute of Mining and Metallurgy ; Proceedings of the Metallurgical Society of the Canadian Institute of Mining and Metallurgy ; the moral reading of the American constitution