Electric eyes : a concise and elementary description of the photo-electric cell, for the non-technical reader: its uses in industry, and its uses and short-comings in colorimetry / A. J. Fawcett
Electric eyes : a concise and elementary description of the photo-electric cell, for the non-technical reader: its uses in industry, and its uses and short-comings in colorimetry / A. J. Fawcett Inglês
Slisbury : The Tintometer, [19??]
28 p. : il. 22 cm