ECE energy series
United Nations
The ECE energy series
UNECE energy series
Economic Commission for Europe, Geneva
United Nations 1992 ECE energy series no. 10
Available at 4 libraries
United Nations 1991 ECE energy series no. 6
Available at 8 libraries
Economic Commission for Europe
United Nations 1991 ECE energy series no. 7
Available at 9 libraries
United Nations 1990 ECE energy series no. 3
Available at 1 libraries
United Nations 1989 ECE energy series no. 2
Available at 3 libraries
United Nations 1989 ECE energy series no. 1
Available at 2 libraries