OATETIME GROUP LENGTH r.;: CSSERVATION !-:. Sq!: F S L:M.I.&A~Y OF SIGHTING PROJECT 10073 RECORD CARD TYPE OF O~SERVATIOH . 0 G ro un d- Vi suo! Gtounc.I-Rado; 0 Ai,..Vis~ol NUMSi:~ 0 ? ~9J=crs 0 Air-!rl~rc~Jpt CON:::LUSIOt-~S \Yo s B ol l oon P robably Oolloon ibl y Ba lloon \'( .,., A ircraft I Probo~ly A: r c rc h Po ibly 1\ircroft Was Asuonomic:~l ~1 . ' }r') l' :Pro b o bl y A :.tronoml col Po~sibly Astronomical ln'\Liffici"nt Omo for Ev o l11'.:1tio n