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| 100 | 1 | ⊔ | ‡aKrugman, Paul R |
| 245 | 1 | 0 | ‡aIncreasing returns and economic geography / ‡cPaul Krugman |
| 260 | ⊔ | ⊔ | ‡aCambridge, MA : ‡bNational Bureau of Economic Research, ‡c[1990] |
| 300 | ⊔ | ⊔ | ‡a28, [5] p. : ‡bill. ; ‡c23 cm |
| 490 | 0 | ⊔ | ‡aNBER working paper series, ‡x0898-2937 ; ‡vworking paper no. 3275 |
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| 650 | ⊔ | 0 | ‡aMonopolistic competition ‡xMathematical models |
| 650 | ⊔ | 0 | ‡aIndustrial location ‡xMathematical models |
| 710 | 2 | ⊔ | ‡aNational Bureau of Economic Research |
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