One of those that's hard to find much information about, so here it is:
"The most inclusive collection of modern poetry ever published in America." "Six years in the making." "Including works by Nobel Prize-winners Pasternak, Quasimodo, and Seferis" to which one should add, since the book's publication in 1966, Elytis, Aleixandre, Jiminez, Montale, Neruda, and Paz (despite the latter couple's dubious designation as "European"). Strangely, St. John Perse is absent - copyright issues? The languages are: French, Italian, Spanish, Russian, German, Greek. Some fine names here: Supervielle, Eluard, Char, Michaux, Aragon, Reverdy, Apollinaire, Desnos, Follain, Rilke, Trakl, Benn, Brecht, Celan, Bachmann, Grass, Sikelianos, Kazantzakis, Gatsos, Saba, Ungaretti, Pavese, Mayakovsky, Akhmatova, Mandelstam, Machado, Vallejo, Lorca, Alberti, Hernandez, Guillen, Huidobro. Later anthologies would fill the gap of this one (for example, Michael Hamburger's "East German Poetry" and "Modern German Poetry 1910-1975," Daniel Weissbort's "Poetry of Survival," the Penguin "Modern European Poets" series, etc), but this is a pretty good primer. Translators include Robert Lowell, Samuel Beckett, Richard Wilbur, Michael Hamburger, W. S. Merwin, Thomas Merton.