1923 S standing liberty quarter

I noticed the 1923 S standing liberty quarter is missing from the list. Could this be added on?

Thank you

 Agreed - it is missing from the page ...
https://en.numista.com/catalogue/pieces3573.html
but it will not let me add it.
 It does exist ...
http://www.ngccoin.com/price-guide/us/standing-liberty-quarters-pscid-37-desig-ms
so I guess only the referee can amend the page.

 Thanks - and welcome to the forum.