Prior to 1971, when the place associated with the item was in question, this condition was indicated by the addition of the letter q in the third character position of the code or by the use of the next higher letter if the third character position was already used.  This practice was discontinued in June 1971.  For example, with imprint [Paris?], before 1971 code frq was used instead of fr; and with imprint [Chicago?], code ilv was used instead of ilu.  When using the country codes to retrieve records, this practice should be specially noted as not all records encoded before 1971 may have been changed.

See also: