Aeronautics. Accidents Plane carrying Ron Kessler and Don Sendgraff missing in Northern Colorado. Rockies since Ja 6. RMN Ja 10, 1978 p.16 Confusion over phone call delayed search for missing plane for 2 days. RNllV Ja 11, 1978 p.9 Post Ja 11, 1978..p.20 Erroneous report delayed for llg days search for missing light plane west of Ft. Collins. Post Ja 25, 1978 p.66 0
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