These maps are available free to libraries until May 18. There are US and non-US maps. US postage will be paid, but not to requests sent outside of the United States.
https://psu.box.com/s/rixn3yvxia00u33jsv8yh3pmqoxhkzz9
Send requests to:
Jenny Litz
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Jenny Litz
Maps Library Assistant, Donald W. Hamer Maps Library
Penn State University Libraries
1 Pattee Library
University Park, PA 16802