Alcatel-Lucent released the entire Bell System Technical Journal catalog in PDF format. http://www.alcatel-lucent.com/bstj/
With this posting of the Bell System Technical Journal from volume 1 issue 1 in July 1922 to the final issue published in December 1983, we are pleased to be able to open the vault of this knowledge to our global technical colleagues.A search for UNIX includes:
Ritchie, D.M.; Johnson, S.C.; Lesk, M.E.; Kernighan, B.W.
Cohen, H.; Kaufeld, J.C. Jr.
Kernighan, B.W.; Lesk, M.E.; Ossanna, J.F. Jr.
Ritchie, D.M.; Thompson, K.