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Federal
NASA Technical Reports Server (NTRS)
National Aeronautics and Space Administration —
The NTRS is a valuable resource for researchers, students, educators, and the public to access NASA's current and historical technical literature and engineering... -
Federal
STI Tagging Models
National Aeronautics and Space Administration —
Keyword models for a subset of the NASA Thesaurus (https://www.sti.nasa.gov/nasa-thesaurus/). These models were trained on the NASA Technical Reports Server (NTRS)....