MAIN ACHIEVEMENTS AND SIGNIFICANCE OF THE SIXTH FIVE YEAR STATE KEY TECHNOLOGIES R AND D PROGRAMME——STUDY ON THEDEVELOPMENT OF COAL FORMED GAS IN CHINA
XU Yong-chang
Natural Gas Geoscience . 2005, (4): 403 -405 .  DOI: 10.11764/j.issn.1672-1926.2005.04.403