...
Call number: For the photocopy, use the same call number as you would for the original, only with an "a" at the end of the date.
Example:
QM 21 V57 1950a
...
Call number: For the photocopy, use the same call number as you would for the original, only with an "a" at the end of the date.
Example:
QM 21 V57 1950a