The preprint is a PDF file of length 307 kB  -  you need to use a password to open it.  The password is "open."

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The above was a preliminary preprint the article is:

 The Chi Representation of Standard Nitrogen, Argon and Oxygen Adsorption Curves

printed in: J. B. Condon, Langmuir, 17(11) (2001) 3423-3430

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