Lucy Lippard "Escape Attempts" essay on beginning of Conceptual Art
Lucy Lippard "Escape Attempts", Reconsidering the Object of Art 1965-1975, ed. Ann Goldstein and Anne Rorimer (Cambridge, Mass.: MIT Press, 1996).
This is a good essay on the beginning moments of Conceptual Art...
Click lippardescapeattempts.pdf link to view the file.