TY  - ART
TI  - Metro manual, a hand book for engineers; containing technical information regarding the construction, adjustment and use of transits, tachymeters, theodolites, alidades levels, etc — Illustration, Page 19
PY  - 1915
UR  - https://www.biodiversitylibrary.org/page/17671549
ID  - page-17671549
ER  -