NOTE - ALL the Canadian Comics have their own section on DCM at the following link:https://digitalcomicmuseum.com/index.php?cid=271I wasn't able to track down a single source that covers this topic. But I did find a few that read together might give you some idea of the short live of Golden Age Canadian Whites.
A History of Canadian Comics on Wiki with a paragraph on Superior -https://en.wikipedia.org/wiki/Canadian_comics1942 by Ivan Kocmarek(A look into the first full year US comics were banned and the birth of the first Canadian comic publishers)
https://www.comicbookdaily.com/collecting-community/whites-tsunami-weca-splashes/1942-if-day/A Quick history of Superior Comics in general -https://joeshusterawards.com/2009/12/23/superior-comics-question/A deeper look at the history of Canadian Comics during WW2 on 'Canadian Heroes' by Mac Murdock -http://www.internationalhero.co.uk/c/canagold.htmThe Comic Menace By John Bell(Talks about the growing hysteria against comics from the Canadian side of the boarder during the 1940s and 50s.)
https://maisonneuve.org/article/2006/10/5/comic-menace/Crime Comics Remain Illegal in Canada - by Brock University Co-Op Student Alex Hobbs(More on the laws against Crime comics in Canada)
https://niagaralaw.ca/crime-comics-remain-illegal-in-canada/Manitoba History: Dick Tracy Gets Smacked Down - Crime Comics in Manitoba by Sgt. John Burchill -(A deeper look at the two cases prosecuted for selling 'crime comics' in Canada mentioned in the above link)
https://mhs.mb.ca/docs/mb_history/77/crimecomics.shtmlFECA by Ivan Kocmarek(A short period after WECA when US books were still banned but Canadian reprints were allowed)
https://www.comicbookdaily.com/collecting-community/whites-tsunami-weca-splashes/feca/Superior Publishing buys Chesler comics(After WECA is dropped and several others perished, Superior actually expanded into America in 1947.)
https://bipcomics.com/showcase/logos/index.php?data=superiorA look into the strange history of Chesler's 'Rocketman' and the Mystery of 'Atomic Comics #1' by Mark Seifert -https://bleedingcool.com/comics/cheslers-rocketman-and-the-mystery-of-atomic-comics-1-at-auction/Maple Leaf Comics (another Canadian publisher) history -https://comicsyrup.wordpress.com/2011/09/07/maple-leaf-comics-lucky-rocket-better/Bell Features (yet another publisher) tariff battle in 1947 by Mark Seiferthttps://bleedingcool.com/comics/the-tariff-dispute-that-chronicled-the-end-of-mr-monster-and-nelvana/We hope everyone found something to enjoy in this Canadian Comics Flood.
Take care all,
-Yoc