050 LC Call Number
050 LC call number- if present, do not delete; accept unchanged or edit for use in 090
- for classes M, N or P, adjust to local practice
- date: for non-fiction, use copyright date ; for literature, use printing date
- for conferences or proceedings, if the conference is the main entry, use the conference date. If the not use the publishing date (260 $c)
- if 050 ends in vol. # add another call number in 090 for subject of the book
- for additional 050 guidelines click here