00334pab a2200133 454500008004000000100001800040245005500058260000900113300001100122362001200133650002400145650002000169773001100189180718b1997   xxu||||| |||| 00| 0 eng d  aBecker, Bernd  aInformal sector statistics and national accounting  c1997  ap.5-21  aOct-Dec  aNational accounting  aInformal sector  aMargin