https://tn250.com/
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Tennessee America 250 celebrates and commemorates America’s 250th Anniversary by interpreting and preserving the unique Tennessee stories, objects, landmarks,...
https://data.eol.ucar.edu/dataset/102.228
NSF NCAR EOL data archive -- TN250 Sound Velocity Data [Shull/UW]
nsf ncardata archiveeolsoundvelocity