Twentieth Century American Poetry is a collection of poetry written by the most important and influential American poets of the 20th century. It includes 50,000 poems drawn from 750 volumes by over 300 poets.

Twentieth Century English Poetry contains the poetry of over 200 poets from 1900 to the present day. It includes poetry in English by poets from outside the British Isles, as well as significant translations of non-English poetry.

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