Technology
Technology
HERSCHEL, JOHN W.F. - INTRODUCING 'POSITIVE' AND 'NEGATIVE' IN PHOTOGRAPHY.
On the Chemical Action of the ..(London, Richard and John E., Taylor, 1840.
KLENZE, SYNDICUS - CHR. HANSEN.
Prüfung der Eisenbhahn-Project..Itzehoe, Schönfeldt, 1840. - Schleswig, Bruhn, 1840.
BERTHAULT-DUCREUX, (CLAUDE JEAN BAPTISTE).
Essai d'un Traité sur L'Entret..Paris, Carillian-Goery, 1841.