Person evidence · E-V99-013
Holland supplies balloon-release and weather-blimp information; radar interference examined
DocumentedSecondhandThe record itself is established; conveyed by someone else. 1950-11-10 · Investigative memorandum
Why this grade
DocumentedSecondhand From the Evidence Log's Assessment ("Conventional hypotheses documented, not final proof"), and Firsthand? ("No"). Grade rules.
Record
From the workbook: the Evidence Log sheet.