Concise AACR2rule 4B2

4B2

If a bibliographic resource has two or more places of publication, distribution, etc,, and/or two or more publishers, distributors, etc., give the first named place and publisher, distributor, etc. If another place and publisher, distributor etc., is more prominent in the chief source of information, also give that place and publisher, distributor, etc.
If a place and/or publisher in your country is named in a secondary position, optionally add that place and publisher, distributor, etc.

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