00338nam a2200121Ia 4500008004100000082001800041100001600059245007800075260002800153300000900181600001400190650001200204140224s9999    xx            000 0 und d  a547.211:62 M6  aVeena, D.R.  aBiogas technology; a study of community biogas plant sponsored by UNICEF/  aNew DelhibAshishc1986  a94p.  aD.R.Veena  aMethane