Use Bloomberg (see access details) function STGO for state issued bonds.

Use Mergent BondViewer.

Use Moodys.com.

Use EMMA (Electronic Municipal Market Access) from MRSB.

Use MSRB in WRDS for price, yield, and interest rate of municipal bonds as well as historical information and other bond characteristics.

Note: WRDS requires a separate registration process.

Take a look at Mergent Bond Record [formerly Moody's], shelved in the Lippincott Library Peck Collection at call number HG 4905 M78.