how to find the ABA/routing number for checks

Hi,

I have created a query that gives me a listt of checks  from the BankChequeTable. However I also need to display the ABA/routing number in my query, and that field is not in the BankChequeTable. Which table can  I find the ABA/routing number information and how is that table linked to BankChequeTable?

Thanks for your help.