There's a 1951 article by John von Neumann, Various techniques used in connection with random digits, which I would really like to read. It is widely cited, but I can't seem to find an actual copy of the paper, be it free or paying.
Is there a general strategy to find copies of relatively old papers like this one?
EDIT: I've searched quite a lot before posting this question and fond the following reference:
Journal of Research of the National Bureau of Standards, Appl. Math. Series (1951), 3, 36-38
Unfortunately, my library doesn't have it, and it is not in NIST's online archive (neither at http://www.nist.gov/nvl/journal-of-research-past-issues.cfm nor at http://nistdigitalarchives.contentdm.oclc.org/cdm/nistjournalofresearchbyvolume/collection/p13011coll6)