https://en.wikipedia.org/wiki/List_of_tallest_buildings_in_Toronto
https://www.theglobeandmail.com/report-on-business/sunlife-move-highlights-bay-streets-geographic-shift/article17074766/
http://torontoskyscraper.blogspot.com/2019/07/cibc-square-construction.html
https://chuckmantorontonostalgia.wordpress.com/2013/06/17/postcard-toronto-downtown-aerial-not-extent-of-rail-and-sheds-mid-1970s/
https://www.reddit.com/r/toronto/comments/16vnol/toronto_skyline_in_1970/
http://torontoskyscraper.blogspot.com/2019/03/history-of-yonge-street-in-north-york.html ,
https://www.youtube.com/watch?list=PLx0sYbCqOb8TBPRdmBHs5Iftvv9TPboYG&time_continue=473&v=zdyR9sa7DYk&feature=emb_title