Mathur, A.N.
Bio gas: Production, management and utilisation / - New Delhi : Himanshu Publications , 1992. - 167 ; .
81-85167-60-5
621.47 / MAT/BIO
Bio gas: Production, management and utilisation / - New Delhi : Himanshu Publications , 1992. - 167 ; .
81-85167-60-5
621.47 / MAT/BIO