Help:ToDo content

sources to check

• https://psmag.com/environment/sound-effects-in-the-silent-movie-era-49317
• https://www.nature.com/articles/1371013a0
• https://tsdca.org/history/
• https://gallica.bnf.fr/ark:/12148/bpt6k55097828
• https://gallica.bnf.fr/ark:/12148/bpt6k2013679/f8.item#
• https://archive.org/details/loeuvredartvivan00appiuoft/page/n13/mode/2up
• https://archive.org/details/abrgdelhist03mouh/page/366/mode/2up
• http://www.magmouse.co.uk/research/light-console/

https://klara.be/luister/select/pompidou/we-gaan-het-historische-ondertoneel-van-de-bourlaschouwburg-laten-zakken

• http://dictionnaire.sensagent.leparisien.fr/Theatre%20Archive%20Project/en-en/

• http://www.regietheatrale.com/index/index/thematiques/lexique/11.html (batch?)
• http://perso.numericable.fr/~fborzeix/fred.borzeix/spec/technic/info3glo/gtts_pdf.pdf

books to check

• Stage lighting, principles and practice Hardcover – January 1, 1936 by C. Harold Ridge (Author) https://www.amazon.com/Stage-lighting-principles-practice-Harold/dp/B00089LJPS

new properties

• specific property for logo
• child of internal picture
• property "refers to" and inverse "is refered to by"

more details in properties + check inverse where needed.