Erişim adresi : https://ntrs.nasa.gov/search.jsp
Over 500,000 aerospace-related citations, over 200,000 full-text online documents, and over 500,000 images and videos are available in the three collections that are integrated in NTRS. 1) NACA Collection: citations and reports from the National Advisory Committee for Aeronautics period lasting from 1916 to 1958. 2) NASA Collection: citations and documents created or sponsored by NASA starting in 1958 and continuing to the present. 3) NIX Collection: citations and images, photos, movies, and videos are downloaded from the NASA Image eXchange and served out through NTRS. Search and retrieval in NTRS is through a common interface. Types of documents in NTRS include: conference papers, journal articles, meeting papers, patents, and research reports.
