{"id":"grudge1949report","URL":"https://upload.wikimedia.org/wikipedia/commons/3/39/Project_GRUDGE_Report_1949.pdf","type":"report","title":"Unidentified Flying Objects: Project \"Grudge\" (Technical Report No. 102-AC-49/15-100)","author":[{"literal":"Air Materiel Command, U.S. Air Force"}],"issued":{"date-parts":[[1949]]},"catalog-key":"SRC0DFY3W8N6XV5"}