Perhaps you should try some spelling variations:
univ » uni
unit » uni
http://id.loc.gov/authorities/names/n93002992" » https://id.loc.gov/authorities/names/n93002992"
http://id.loc.gov/authorities/james/n93002992" » https://id.loc.gov/authorities/james/n93002992"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("(univ or unit) shells / http://id.loc.gov/authorities/names/n93002992") OR ("(univ or unit) shells / http://id.loc.gov/authorities/james/n93002992")).
• Removing quotes may allow a broader search: (( (univ or unit) shells / http://id.loc.gov/authorities/names/n93002992 ) or ( (univ or unit) shells / http://id.loc.gov/authorities/james/n93002992 )).
• Adding a wildcard symbol may retrieve word variants: (("(univ or unit) shells / http://id.loc.gov/authorities/names/n93002992") or ("(univ or unit) shells / http://id.loc.gov/authorities/james/n93002992"))*.