Sec. Geral Ministério da Economia Search for 'an:961 and au:Steeg, Helga'

Energy efficiency and the environment

By International Energy Agency. Paris OCDE ; IEA 1991 . 239 p. 27 cm. 92-64-13561-8

By International Energy Agency. Paris OCDE ; IEA 1993 . 236 p. 27 cm. 92-64-13804-8

By International Energy Agency. Paris OCDE ; IEA 1994 . 217 p. , Vol. I - Países da OCDE 27 cm. 92-64-14142-1

By International Energy Agency. Paris OCDE ; IEA 1992 . 277 p. 27 cm. 92-64-23561-2