Use Bloomberg:

• For credit worthiness of US states and territories, type STGO then press GO.
• To identify specific state securities, type SECF then press GO.  Change the Category to Fixed Income, then in the drop-down menu go to Muni tab.  From here you will see all Muni Bonds and can filter using any of the amber fields above each column, e.g., by state.

Or use Mergent Bond Record
Available in print: Ref. HG4905 .M78 in the Stamps Reading Room