TY  - ART
TI  - Negretti & Zambra's encyclopædic illustrated and descriptive reference catalogue of optical, mathematical, physical, photographic and standard meteorological instruments, manufactured and sold by them — Illustration, Page 239
PY  - 1887
UR  - https://www.biodiversitylibrary.org/page/16784077
ID  - page-16784077
ER  -