APA Style
Regens, James L.. ().
Europe's population in the 1990s .
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Chicago Style
Regens, James L..
Europe's population in the 1990s.
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MLA Style
Regens, James L..
Europe's population in the 1990s.
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,
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Turabian Style
Regens, James L..
Europe's population in the 1990s.
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,
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.