John Cage
http://www.newalbion.com/artists/cagej/
http://wings.buffalo.edu/epc/authors/cage/
http://home.flash.net/~jronsen/cagelinks.html

Language Poetry
http://www.poetrypreviews.com/poets/language.html
http://wings.buffalo.edu/epc/authors/perloff/langpo.html
http://home.jps.net/~nada/language1.htm
http://www.english.upenn.edu/~afilreis/88/chap9.html

Marcel Duchamp
http://www.understandingduchamp.com/
http://www.artchive.com/artchive/D/duchamp.html
http://www.beatmuseum.org/duchamp/marcelduchamp.html
Duchamp's Bachelor Machine

George Oppen
http://www.english.uiuc.edu/maps/poets/m_r/oppen/oppen.htm
http://www.onlinepoetryclassroom.org/poets/poets.cfm?prmID=944
http://en.wikipedia.org/wiki/George_Oppen