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Where can people find documented information about this project?
The official Heidrun project page is: https://digitalpubliclibraryofamerica.atlassian.net/wiki/display/TECH/Heidrun
The API documentation for Kri-Kri is at: http://www.rubydoc.info/github/dpla/KriKri/master
Who can people contact for more information?
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