Eric Nguyen
Photo of tornado under Survivor Stories of the white rope stage tornado. - Website

Robb Lawson
Info on warnings, tornado track, acknowledgement, reports and radar overlay.

Gene Rhoden
Supercell thunderstorm photo on 7:30 PM page - Website

Wichita State University
A Social Psychological Interpretation of the Udall, Ks Tornado -  Libraries Department of Special Collections at 316-978-3590 - Website