00461nam a2200121Ia 4500008004100000040001700041082002200058110006700080245009500147260002200242300001000264650006500274190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta614.7bO68P  aOrganisation for Economic Co-operation and Development (Paris) 0aProblems of environmental economicsbrecord of the seminar held at the OECD in summer 1971  aParisbOECDc1971  a278p.  aEnvironmental economics; Environmental indicators; Pollution