I've made available a several-page excerpt from George Hartley's book on language poetry. This is the passage in which he outlines modernist influences: Dickinson, Stein, Ashbery, Williams, and Zukofsky. I chose a section that focuses particularly on Steinian and Ashberyian elements of the movement. On Stein:
Stein's importance for them appears to lie in the following qualities of her work:
1. Although her work appears to be meaningless, it does have meaning; in fact, it seems to be an exploration of the very conditions for meaning.
2. Meaning is not forwarded as something existing out in the world but as an interaction between subject and object.
3. Her work appears to operate under the assumptions of the Saussurean conception of meaning as a function of a system of difference.
4. She does not write in order to enclose (define, delimit, decipher) the world but to move within it; in other words, she does not function according to the static determinism of the noun but through the process of relationship.
5. Her foregrounding of the material side of language (sound, rhythm, syntax) is a formal analogy of the process of perception--the "movement 'spreading' from transparency . . . to the implied darkness & opacity of blindness."