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3
Economic Conditions, Illicit Drug Use, and Substance Use Di..
NBER working paper series, no. w22051
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4
Homotopy theory: proceedings of the Durham Symposium 1985
London Mathematical Society lecture note series, 117
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6
Federalism and Regional Development
Case Studies on the Experience in the United States and the...
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9
Zeitschrift für Allgemeine Mikrobiologie
Morphologie, Physiologie, Genetik und Ökologie der Mikroor...
Zeitschrift für Allgemeine Mikrobiologie ; Volume 24, Number 8