| |
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| Utgitt
| New York : National Bureau of Economic Research : distributed by Columbia University Press , 1976
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| Omfang
| xxiv, 360 s. : & microfiche (3 sheets : 11 x 16 cm.) in pocket. : graphs
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| Opplysninger
| Bibliography: p. 345-356.. - Includes index.
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| Emner
| |
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| ISBN
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