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From: ogawa@orion.arc.nasa.gov (Arthur Ogawa)
Newsgroups: comp.text.tex
Subject: Re: Cross-references bib-style (a la "Concrete Mathematics")?
Summary: look in LaBrea.Stanford.edu
Keywords: Concrete bibliography gkpmac
Message-ID: <1991Feb13.055115.1338@news.arc.nasa.gov>
Date: 13 Feb 91 05:51:15 GMT
References: <1991Feb12.122357.19079@lth.se>
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In article <1991Feb12.122357.19079@lth.se> collberg@DNA.LTH.Se (Christian S. Collberg) writes:
>I asked this question once before but got no answers. 
>
>Does anyone have the bib-style used in Graham, Knuth, Patashnik's
>"Concrete Mathematics"? In Concrete Math the bibliography is
>organized so that the numbers of the pages where a certain bibliographical
>entry is referenced are printed in the margin next to the entry.

look in LaBrea.Stanford.edu under the DOC directory for the file GKPMAC.TEX.
This is the macro package that Don used for the book.
See also the article in TUGboat that Knuth wrote about typesetting 
Concrete Mathematics.