(1948). The petroleum handbook: Compiled by members of the staff of companies of the Royal Dutch (3rd ed.). London: Shell International Petroleum Company.
Παραπομπή Chicago StyleThe Petroleum Handbook: Compiled By Members of the Staff of Companies of the Royal Dutch. 3rd ed. London: Shell International Petroleum Company, 1948.
Deismireacht MLAThe Petroleum Handbook: Compiled By Members of the Staff of Companies of the Royal Dutch. 3rd ed. London: Shell International Petroleum Company, 1948.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.