Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ ATC SURVEILLANCE/COMMUNICATION ANALYSIS AND PLANNING https://trid.trb.org/View/17329 Wed, 06 Nov 1974 00:00:00 GMT https://trid.trb.org/View/17329 ATC SURVEILLANCE/COMMUNICATION ANALYSIS AND PLANNING https://trid.trb.org/View/16221 Tue, 18 Jun 1974 00:00:00 GMT https://trid.trb.org/View/16221 ATC SURVEILLANCE/COMMUNICATION ANALYSIS AND PLANNING https://trid.trb.org/View/14315 Mon, 25 Mar 1974 00:00:00 GMT https://trid.trb.org/View/14315