000 002820000a22001330004500
245 _aCost benefit analysis
100 _aNishan, E.J.
260 _aLondon
_bAllen & Unwin
_c1971
300 _a364 p.
500 _adiagrams
080 _a657.47
_bM5
041 _aEN
942 _cBK
999 _c95986
_d95986