Marjorie Perloff
The Poetics of Indeterminacy: Rimbaud to Cage.
Northwestern University Press, 1999. Avant-Garde & Modernism Studies. First edition. 0810117649 xvi/346 pages.
Softcover volume, measuring approximately 6.25" x 9.25", is like new. 
"In her seminal study, first published in 1981, Marjorie Perloff argues that the map of Modernist poetry needs to be redrawn to include a central tradition which cannot properly be situated within the Romantic-Symbolist tradition dominating the early twentieth century. She traces this tradition from its early "French connection" in the poetry of Rimbaud and Apollinaire as well as in Cubist, Dada, and early Surrealist painting; through its various manifestations in the work of Gertrude Stein, William Carlos Williams, and Ezra Pound; to such postmodern "landscapes without depth" as the French/English language constructions of Samuel Beckett, the elusive dreamscapes of John Ashbery, and the performance works of Danvid Antin and John Cage.
What we loosely call Modernism, Perloff says, was itself a time of tension between rival though often interwoven strains: the Symbolist mode that Yeats, Eliot and Stevens inherited from Baudelaire and Mallarme and, beyond them, from the great English Romantic poets and the "anti-Symbolist" or "literalist" poetics of indeterminacy whose first real exemplar was the Rimbaud of the "Illuminations."
In the poetry of this "other tradition," ambiguity and complexity give way to inherent contradiction and undecidability, metaphor and symbol to metonomy and synecdoche, the well-wrought urn to what Ashbery calls "an open field of narrative possibilities," and the coherent structure of images to "mysteries of construction," and free play."