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Enluation
II-Balloon
1-A.slralllllliCII
2•Airtrlfl
Hiaht"""1oo.
4-Birds
S.Clouds. Dust, etc.
6-lnsuffic.lnfD.
7-Psydlolo~cal
11-Unlcnown
9-0ther
Total
Evaluation
II-Balloon
I-Astronomical
1-Aircraft
3-Liaht Pl11nom.
4-Birds
5-Clouds, Dus~ et~
6-lnsuffic.lnfo.
7-Psycholoaical
&-Unknown
9-0ther
Total
Evaluation
II-Balloon
I-Astronomical
2·Aircraft
3-Liat,t Phenom.
4-Birds
5-Clouds, Dus~ et~
6-lnsuffic. klfo.
7-Psycholopcal
11-UnknoMI
9-0ther
Total
Certlin
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Number Per Cent
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