Dada Magazine, Issues 1-3 (1917-1918), all PDFs:
http://www.ubu.com/historical/dada/index.html (http://www.ubu.com/historical/dada/index.html)
Ubuweb rules the net! If it existed in the twentieth century in written, spoken or recorded form it eventually finds itself hosted there. What I find interesting is the perspective - one can look at these copies of Dada Magazine and have a sense of history and its place in that history. It's a good luxury and probably a very important one.