You can do an empty query in their catalog, and use the "Original Location" facet to filter to a holding library. Programatically, I'm not sure, but you'd probably need to use the Hathi files: http://www.hathitrust.org/hathifiles.

-Jon

On 08/03/2012 11:07 AM, Eric Lease Morgan wrote:
If I needed/wanted to know what materials held by my library were also in the 
HaitTrust, then programmatically how could I figure this out? In other words, 
do you know of a way to query the HaitTrust and limit the results to items my 
library owns? --Eric Lease Morgan

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