1. National Economy Report of China, a speech of the Chinese Prime Minister at the 4th meeting of the 8th term of People's Congress;Li,1996
2. Developing Natural Gas in North Shannxi Province and Transmitting Natural Gas to Beijing;Hu,1993
3. Pre-feasibility of Developing Compressed Natural Gas Automobiles in Beijing;Guo,1996
4. Though Small, Natural Gas Fleets are Growing;Karl;Paul City Business,1994
5. Good News;Mordechi,1994