History of sound recording WIKI
Världens äldsta inspelningar (First Sounds). Här finns allt man kan tänka sig.
Museum of Magnetic Sound Recording
Internet Archive
History of photography WIKI
History of film (Encyclopedia Britannica)
History of film technology WIKI
Sound Film WIKI
Socialstyrelsen om Kallmans syndrom
Long-Term Consequences of Castration in Men: Lessons from the Skoptzy and the Eunuchs of the Chinese and Ottoman Courts
Slavery sociology Encyclopedia Britannica
Bibeln Online