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Tajima, M. , Imou, K. , Yokoyama, S.. "Estimation Method for the Construction of Hydrogen Society with Various Biomass Resources in Japan-Project of Cost Reductions in Biomass Transport and Feasibility for Hydrogen Station with Biomass-". World Academy of Science, Engineering and Technology, Open Science Index 9, International Journal of Environmental and Ecological Engineering, (2007), 1(9), 107 - 111.