File:Zeiss Ikon ZM 35 mm rangefinder camera with Planar T* 50mm F2 lens and silver Abrahamsson soft release.jpg - Wikipedia
Mike Elek: Zeiss Ikon / Zeiss Ikon history
Zeiss Ikon Ikonta - Lost and Found, a 70 Year History - By Conor O'Brien - 35mmc
Zeiss Ikon: the German camera empire - Vintage-photo
The Tenax II: Zeiss Ikon's Precision, Fast-action Camera: A PictorialCompendium and Gallery of Work: Loder, Michael Wescott: 9781389878213: Amazon.com: Books
Zeiss Ikon Voigtlander Vitessa 500-L Film Camera Color-Lanthar 1:2.8/42