The greatest single source of information is Wikipedia, so enter the item you're researching in their search window and, after reviewing it, check the references at the bottom for further related links. Below are a few resource links for some of the commonost vintage media items found on this website. Hopefully they have reciprocated our link as requested. More links will be added from time to time, so, if you don't find what you're looking for, try again later.

AURICON CINE CAMERAS
Auricon company history and models made: https://sites.google.com/site/mdavidholmes/auricon-16mm-cameras
Articles on Auricon history: https://sites.google.com/site/mdavidholmes/auricon-16mm-cameras https://uclaamia.wordpress.com/2018/04/29/material-realism-the-auricon/

BELL & HOWELL CINE CAMERAS
Bell & Howell company history: https://www.madeinchicagomuseum.com/single-post/bell-and-howell
Filmo 70 16mm cine cameras: http://www.tfgtransfer.com/filmo-page2.htm
Video how to lubricate Filmo 70 16mm cine cameras: https://www.youtube.com/watch?v=bx1PBlwxwu8
Video how to operate an Eyemo K 35mm cine camera: \https://www.youtube.com/watch?v=vJPK_-goUrg
Inside the Bell & Howell Eyemo cine camera: http://cinetinker.blogspot.com/2013/06/inside-bell-howell-eyemo.html
Eyemo PDF service manual: http://www.vintagecameras.fr/images/MonSite/BELL-HOWELL/Eyemo/_doc/Bell&Howell_Eyemo_Manual_en.pdf

BOLEX CINE CAMERAS
Bolex company history: http://bolexh16user.net/BolexCompanyHistory.htm?LMCL=Uc2vhO
Bolex models and info: https://www.collectorsweekly.com/articles/an-interview-with-vintage-bolex-movie-camera-collector-michael-tisdale/
Video describing Bolex H16 cine cameras: https://www.youtube.com/watch?v=Xtvxad0js3s