Perhaps the Library of Congress??

        http://www.loc.gov/z3950/

You could hack the web interface, but it would be more efficient to 
query the database directly using the Z.39.50 stateful protocol: see

        http://lcweb.loc.gov/z3950/gateway.html#about
and
        http://www.niso.org/standards/resources/Z3950_Resources.html

among other places. You could probably write a pretty decent 
interface using PHP's socket functions, but it would be more 
efficient to write a PHP extension for it - depending on how intense 
your searches were. That was on my to-do list for a project a few 
years ago, but I'm no longer working on that.

        -steve



At 4:32 PM -0500 1/29/02, Reuben D Budiardja wrote:
>Hi,
>I am working on a projects for book cataloging. What I want to do is to input
>all the books isbn to a mysql table, either by hand or by scanning it, and
>then let php go through those data and add more info such as tittle, author,
>publisher, etc.
>
>Now, the real question is, does anyone know is there any database / services
>out there that I can query using isbn, that will return me a parse-able info
>for this purpose?
>I am looking for service that is free, if possible, since this project is not
>for commercial at all (academic purposes).
>
>Any information on this will be greatly appreciated.
>
>Thanks.
>Reuben D. Budiardja
>


-- 
+------------------------------------------------------------------------+
| Steve Edberg                                      [EMAIL PROTECTED] |
| University of California, Davis                          (530)754-9127 |
| Programming/Database/SysAdmin               http://pgfsun.ucdavis.edu/ |
+------------------------------------------------------------------------+
| "Restriction of free thought and free speech is the most dangerous of  |
| all subversions. It is the one un-American act that could most easily  |
| defeat us."                                                            |
|                 - Supreme Court Justice (1939-1975) William O. Douglas |
+------------------------------------------------------------------------+

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