Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2024. 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/ P-WAVE VELOCITY MEASUREMENTS IN A MACHINE-BORED, CHALK TUNNEL https://trid.trb.org/View/159429 Fri, 06 Feb 1981 00:00:00 GMT https://trid.trb.org/View/159429 SITE INVESTIGATION FOR TUNNELLING TRIALS IN CHALK https://trid.trb.org/View/62788 Tue, 01 Feb 1977 00:00:00 GMT https://trid.trb.org/View/62788 CHINNOR TUNNELLING TRIALS - BACKGROUND & PROGRESS https://trid.trb.org/View/39777 Tue, 15 Jul 1975 00:00:00 GMT https://trid.trb.org/View/39777