Box-folder 20
Container
Contains 2 Results:
Methode Photographique de Comparaison Precise des Horloges Astronomiques a Distance, (2 Copies), by P. Wulf, , [No Date]
Item — box-folder: 20
Dates:
[No Date]
The Photochronograph and its Application to Star Transits, (2 Copies), , 1891
Item — box-folder: 20