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"Barack Obama Sr.'s Letter of Achievement
Barack Obama Sr. excelled in his classes at the University of Hawaii, completing his undergraduate degree in three years. The 1961 letter by the president's father is one of nearly two dozen discovered by an archivist. It offers a portrait of his life in the United States:

https://assets.documentcloud.org/documents/2866463/Thank-You-Letter-for-Aid-From-Obama-s-Father.pdf

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"Appeal for Funds for Living Expenses by Barack Obama Sr.
In 1962, Barack Obama Sr. began his graduate studies at Harvard University and requested financial assistance to help him cope with the high cost of living in Cambridge, Mass. The letter is one of nearly two dozen that chronicle his life in the United States:

https://assets.documentcloud.org/documents/2866461/Appeal-for-Funds-to-Help-With-Living-Expenses.pdf