Organisation for Economic Co-operation and Development. (1969). Impact of Natural Gas on the Consumption of Energy: In the Oecd European Member Countries. Paris: O.E.C.D. Publications.
Dyfyniad Arddull ChicagoOrganisation for Economic Co-operation and Development. Impact of Natural Gas On the Consumption of Energy: In the Oecd European Member Countries. Paris: O.E.C.D. Publications, 1969.
Dyfyniad MLAOrganisation for Economic Co-operation and Development. Impact of Natural Gas On the Consumption of Energy: In the Oecd European Member Countries. Paris: O.E.C.D. Publications, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.