00420nam a2200133Ia 4500008004100000040001700041082002400058100001900082245007400101260006500175300001400240650001700254700001500271190329s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta665.776bK45B  aK C Khandelwal 0aBiogas technologyba practical handbookcK C Khandelwal and S S Mahdi  aNew DelhibTata McGraw-Hill Publishing Company Limitedc1986  avi, 128p.  aGAS INDUSTRY  aMahdi, S S