I actually own Sentences by Robert Grenier, probably got it from Small Press Distribution. having seen it on walls of a Franconia College hallway. Ron Silliman has written usefully about it, on his blog and elsewhere (has anyone else?), and I would refer Gentle Reader, and you guys too, to look into Ron's commentary, as well as the thing itself. this site is a really useful replication of the Sentences experience. but you can do more with the thing, the index cards, in hand.