I looked at various documents but could not find any information that talks to how one indicates that the publisher and place of publication are known, but not retrieved from the item itself, so the equivalent of an inferred qualifier for dates.
Regards,
Wynand
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Wynand Van Der Walt Head Librarian: Technical Services Rhodes University Library t: +27 (0) 46 603 8281 Library, Artillery Road, Grahamstown, 6139 PO Box 94, Grahamstown, 6140, South Africa www.ru.ac.za/library