00315nam a22001217a 45000050016000000200022000160350013000380370013000511000016000642450062000802600026001423000025001682012051102422.0  a8185419302c00.00  aA-897973  aDPLbENG  aDutta, Soma  aBiogas :bThe Indian NGO experience /cby Soma Dutta etc.  aNew DelhibTERIc1997  axiii, 128p.c22 cms.