Old formats from Microsoft Works are not supported in modern programs and you are left with two options. Either find installation discs of Works and export your files as CSV, or find a conversion utility that allows you convert WBD databases to XLS format directly.
Convert Microsoft Works database to Microsoft Excel 97 to 2003 workbook.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert wbd to xls on Windows
An older office and productivity suite for Windows
Convert from wbd file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.