I wrote many articles about the Canadian commemorative silver dollars and this was the first:
https://steemit.com/steemsilvergold/@ronaldoavelino/56-usd1-canadian-commemoratives-part-1
About the circulating silver dollars, I wrote two articles:
https://steemit.com/steemsilvergold/@ronaldoavelino/63-the-canadian-silver-dollar-part-1
https://steemit.com/steemsilvergold/@ronaldoavelino/65-the-canadian-silver-dollar-part-2