It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Miscellaneous hints, tips and guidelines to make the process run more smoothly:
Serial Set Volumes:Enter "Y1.1/2:" + Vol. # in SuDoc field and "Serial Set " + Vol. # in the Title field. For example: SuDoc = Y1.1/2:1234 Title = Serial Set 1234