FIPP - worldwide magazine media association
https://internationalmagazinecentre.com/category/blog/
https://www.pressgazette.co.uk/
https://www.campaignlive.co.uk/
http://www.publishingtrends.com/
https://www.visualcapitalist.com/
http://www.mastheadonline.com/
http://wwd.com/business-news/media/