Because of variations in Library Catalogue records, references imported from Library Catalogues often have imperfections. References with missing authors are probably edited books. Audiovisual material and Edited Books are often wrongly given Book reference type. You will need to edit each reference separately, making changes to fields and reference type. Some hints:

• Book editors are often in dumped into the Notes field.
• Missing years can often be found in either the Date or the Notes field.
• Publication details, especially for conference proceedings, are sometimes mixed in with the Title and need to be either deleted or moved to other fields.
• Edited books and Audiovisual items are often wrongly classed as Bookreference type.