000 00304cam a22001217a 4500
008 180718b1977 xxu||||| |||| 00| 0 eng d
082 _aT1 T952
100 _aTyagi, B.P.
245 _aEconomic systems
_cby B.P. Tyagi
260 _aMeerut
_bJai Prakash Nath
_c1977
300 _a264p.
650 _aEconomics
999 _c355846
_d355846