A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
You could have the previous sheet's name in a cell - say, cell A2 - and use a formula like
=INDIRECT("'" & A2 & "'!A5")
But you would need to enter the previous sheet's name into cell A2 for every new copy of the sheet.
A much, much better approach is to use just 1 sheet, with additional columns of key values (I assume week number is important) to which you can apply filters to replicate the view that you want with each of the 52 sheets. Then you will have all your data in one table - from which you can create new tables using Power Query or Pivot Tables.