@misc{indiciae1b5cf5958d74,
  title = {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 320},
  year = {1887},
  url = {https://www.biodiversitylibrary.org/page/16784158},
  note = {Source identifier: page-16784158}
}