By Larry Hatch (*U* UFO DATABASE, U.S.A.)
Source: Internet Archive, San Francisco, California.
The whole article:
“Three general UFO shapes are overlaid here. Layer #1 in Blue are disks, cones, ovoids, plates and spheres. Violet is for cigars, cylinders, fuselages, cigarette shapes. Layer #3 in Green indicates angular forms: flying triangles, deltoids, diamonds, rectangles etc.
There is some overlap. Multiple shapes are reported at times. A saucer might be overlaid by a triangle, the same place but at a later date. A saucer seen edge-on becomes a ‘cigar’ at times.
Disks outnumber cigars/cylinders, and both appeared early on. Flying triangles show mostly in urbanized areas near coastlines. Rural FTs show around Indiana. One small cluster was near Lumberton, NC in 1975 (79W x 34N) predated a major Belgian deltoid wave by 14 years.”