00311nam a22001097a 4500022001400000082002000014245006500034260003100099300002600130526003700156650000800193  a0951-8987  a388.322bFIEcD  aField survey techniques and analysis for urban bus operators  aWashingtonbThe world bank  a38 P. :bill,c24 cm.  a0b0c0d388_322000000000000_FIE  aMCE