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Does there exist any digital copy of the original article (or a transcript) K. Levenberg, A method for the solution of certain problems in least-squares, Quart. Appl. Math. 2 (1944): 164-168?

It is (obviously!) cited in numerous works, but the paper itself appears to have completely vanished. There seems to be not even any publisher, library, etc. proposing to buy a hard copy or anything alike. Apart from the citations all over the places, the paper has ceased to exist?!

(The question has also been posted on Mathematics SE)

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    $\begingroup$ You seem to have double posted to MO and M.SE. In such a case it is polite to provide links between the two questions. $\endgroup$ – Joonas Ilmavirta Aug 14 '14 at 12:53
  • $\begingroup$ You are right, indeed. Done! $\endgroup$ – Pierre Schroeder Aug 14 '14 at 13:13
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    $\begingroup$ If you're still having trouble getting this through your library, contact me by email. $\endgroup$ – Brian Borchers Aug 14 '14 at 15:30
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This link might be better. The paper is now open access and the pdf is searchable.

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  • $\begingroup$ This should now be the accepted answer. (@PierreSchroeder, it is possible and encouraged to unaccept an answer if a better one comes along). @NiclasBörlin, you might change the link to use the more stable DOI and add that the paper is open access. $\endgroup$ – Christian Clason Nov 7 '17 at 17:15
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As far as I can see, there's no official digitized copy (yet), but I have a hard time agreeing with your statement that no library has a hard copy. For example, looking at the German Zeitschriftendatenbank, you can see that many universities have a copy of that issue, and if you (or someone you know) are at a German university, will probably send you a scanned copy upon request (look for "Fernleihe: Ja").

EDIT: Since there's no full bibliographical detail for the articles in such an old journal, you have to search for the journal (i.e., "Quarterly of Applied Mathematics") and not the article. This will get you a search result (it's the second in the list; the first is to the online version), and clicking "Link zum Gateway" at the bottom of the tab "Details" will lead to the "Gateway Bayern", where you will find a link to "SFX", where you can click on "Dokumentlieferung: Fernleihe im Bibliotheksverbund Bayern". Since I no longer have an account at TUM, I cannot follow from there, but I expect you will be presented with a form where you can enter the precise reference (title, volume, issue, pages etc.) you want to have sent.

Of course, this is not nearly as convenient as getting a current online publication, but that's why librarians are still needed. Moral of the story: If you can't find it online (in reasonable time), take the full reference and ask your librarian. They're trained to help you with precisely such a problem!

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    $\begingroup$ I have to admit that your answer is correct (although it does not solve my problem in practice)! I unfortunately have to conclude that an OPAC request is not necessarily an OPAC (the TUM-UB didn't show any other library's results, and their first release of that journal is 1945!). I suppose as far as I can get. $\endgroup$ – Pierre Schroeder Aug 14 '14 at 15:08
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    $\begingroup$ @PierreSchroeder I just received the scan of our library's copy of the paper; if the steps above don't work for you, feel free to contact me by email. $\endgroup$ – Christian Clason Aug 15 '14 at 12:45
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Maybe a bit late, but is this what you needed?

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