Methods of Locating – Locating Surveillance and Target Acquisition Association
File:Line of sight to Plynlimon - geograph.org.uk - 963435.jpg - Wikipedia
Tellerumeter MRA 3 Microwellendistanzmesser Vermessungsgerät in Bayern - Mainaschaff
South African prototypes, projects, concepts, etc., Page 34
Tellurometer - Wikipedia
Telluromètre (électricité) — Wikipédia
survey Northing & Easting
Surveying Methods Intergovernmental Committee on Surveying and Mapping
RACAL