When microforms of differing generations (with the exception of master preservation copies) and/or polarities are cataloged together:

• Use the 533 note to describe the positive service copy.
• Bring out any special charateristics relating to the particular copies in corresponding LANT ‡a notes using the appropriate phrases described in Bibliographic and Holdings Screens for Multiple Versions.

(A microfilm reproduction service copy and master preservation copy made by Princeton)