00738nam a2200205 a 450000100060000000300080000600500170001400800410003103500190007204000350009104100080012608200240013424501550015826000380031330000330035149000350038465000250041971000530044483000350049752736BD-RjUL20211209075843.0160926s1971    nyu          o100 0 eng d  a(BD-RjUL)52856  aBD-RjULbengcBD-RjULdBD-RjUL  aeng  223a333.7bECE 197110aECE Symposium on Problems Relating to Environment :bproceedings and documentation of the symposium /cUnited Nations. Economic Commission for Europe.  aNew York :bUnited Nations,c1971  avii, 386 p. :bill. ;c28 cm  aEconomic commission for Europe 0aEnvironmental policy2 aUnited Nations.bEconomic Commission for Europe.  aEconomic commission for Europe