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Rivers in literature.
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- rivers (9)
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- amazon river region (6)
- amazon river (4)
- marine ecology (4)
- environmentalism (3)
- marine pollution (3)
- ocean (3)
- prevention (3)
- rain forests (3)
- seas (3)
- africa, north (2)
- animals (2)
- atlantic ocean (2)
- atmospheric circulation (2)
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- families (2)
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- mineral dusts (2)
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