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Dear Mr. Brown,
Thank you for posting your request on History Hub!
The National Archives has a web page listing most, if not all, the records in NARA’s custody regarding Amelia Earhart’s transatlantic flight and her disappearance during her round-the-world flight.
Additional records pertaining to her life may be found in the Amelia Earhart Papers (George P. Putnam Collection) at the Purdue University Libraries.
We hope this information is helpful. Best of luck with your research!
Thanks Rebecca however, I find nothing about Putnam's publicity campaigns for the women's solo race to 'Get Across' the Atlantic or the post flight promotion.