na INLIS000000000000391 20221023101145 0010-1022000132 ta 221023 0 eng 631.8 631.8 UNI u Updated guidebook on biogas development / United Nations Cet. I New York : United Nations, 1984 196p. : ilus. Biogas United Nations 00106/102022/H/EB/BBPPBATU