00815nam a2200229 a 4500 52736 BD-RjUL 20211209075843.0 160926s1971 nyu o100 0 eng d (BD-RjUL)52856 BD-RjUL eng BD-RjUL BD-RjUL eng 23 333.7 ECE 1971 ECE Symposium on Problems Relating to Environment : proceedings and documentation of the symposium / United Nations. Economic Commission for Europe. New York : United Nations, 1971 vii, 386 p. : ill. ; 28 cm Economic commission for Europe Environmental policy 157708 United Nations. Economic Commission for Europe. 157709 Economic commission for Europe 158200 ddc BK 52736 52736 0 0 ddc 0 0 NFIC RUCL RUCL Stack 1974-09-26 Gono prakasoni, Dacca. 104.00 0 333.7 ECE 1971 2016-09-26 00:00:00 C-2 2021-12-09 BK 0 0 ddc 0 1 NFIC RUCL RUCL Reading 1974-09-26 Gono pakistan, Dacca 104.00 0 333.7 ECE 1971 2017-01-03 00:00:00 C-1 2017-01-03 BK