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https://scholarsphere.psu.edu/resources/d2667c23-6e40-4e0d-9087-50b7590e6088
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https://scholarsphere.psu.edu/resources/1fcf9ae1-0b69-45da-b51d-20e6ba2ff889
https://scholarsphere.psu.edu/resources/dbdfaa8e-3933-445f-b27b-4de1b3b21ea5
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https://scholarsphere.psu.edu/resources/cceef9df-8cb2-44b1-9062-d8b069e90aa8
https://scholarsphere.psu.edu/resources/d422540f-88ba-41c2-b8f1-215278f90355
https://scholarsphere.psu.edu/resources/664f2b9a-4fe0-40dd-a764-c56c66ffb589
https://scholarsphere.psu.edu/resources/85b97eaa-d049-4812-a53c-2edb76050a35
https://scholarsphere.psu.edu/resources/d27cbcb9-08aa-477e-8d64-8d01cba9516e
https://scholarsphere.psu.edu/resources/1ec7d7dc-345f-4fcb-9b10-fbe8e6d3f6c4
https://scholarsphere.psu.edu/resources/1db522b9-6b7a-42ba-aa43-e4e16af28435
https://scholarsphere.psu.edu/resources/72b72634-02da-4671-bbb6-5ac1ab0205d7