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| 082 |
_a388.049 _bNAT _cD |
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| 110 |
_aNational Academy of Sciences Washington DC _938575 |
||
| 245 | _aEconomic and social aspects of transportaiton | ||
| 260 | _aWashington DC | ||
| 526 |
_a0 _b0 _c0 _d388_049000000000000_NAT |
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| 942 |
_2ddc _cBK |
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| 999 |
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