AFAIK, "Thus the current citation for it is
J. Reeds, D. Ritchie, R. Morris, "The Hagelin Cipher Machine (M-209): Cryptanalysis from Ciphertext Alone", unpublished technical memorandum, Bell Laboratories, 1978. Submitted to Cryptologia."<p>has been published in 2015:<p><a href="http://cryptome.org/2015/12/ReedsTheHagelinCipherBellLabs1978.pdf" rel="nofollow">http://cryptome.org/2015/12/ReedsTheHagelinCipherBellLabs197...</a>