닭의 목아지를 비틀어도 새벽은 온다. - 1979, 김영삼 -
Early Photography: Making Daguerreotypes
The Daguerreotype - Photographic Processes Series - Chapter 2 of 12 see Photographic Processes Series by George Eastman Museum at Youtube.com
The Photographs of Louis Daguerre
see also a naver blog