Mornin' Ron. I've found that most major publishing houses have printable submission guidelines on their websites. Try DAW books or Doubleday. I'm sure someone else here knows a lot more and specific to poetry. Each major publishing house has a subdivision specializing in genres. These smaller shops usually accept manuscripts from unpublished writers. The Biggies usually will only deal with agented writers, unless you have published poems/stories in magazines or compilations. I haven't had 1st hand experience. Still polishing up oldies to present here. Good Luck!