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        1.
        2008.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Demand for alternatives to petroleum is increasing the production of biofuels from food crops such as corn, soybeans, sorghum and sugarcane, etc. At least for the next 5 years, ethanol demand will be increased greatly in the United States and in the world
        4,000원