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RDA Refresher Performance Support:
What is Different from AACR2?
With the implementation of RDA, some cataloging practices have changed. The Library of
Congress generally does not retrospectively revise records created using earlier codes; they were
correct according to rules in force at the time.
https://drive.google.com/file/d/14A8408A7wLelYfsGFcpJb3Ex6cnv2hQ9/view?usp=sharing