Captions under English literature indicate that time periods for authors have about a ten year leeway, and are not strictly a matter of when the authors published, but can involve judgment about when they flourished:
1900-1960 Including usually authors beginning to publish about 1890, flourishing after 1900
1961-2000 Including usually authors beginning to publish about 1950, flourishing after 1960
Though it is too bad that there is some inconsistency in OCLC, I think that current cataloging should follow the 053. And though I can't speak for LC, IMHO 053's should be changed only when there is an obvious error, and not when an author overlaps time periods.
NAR nr 90028931 (Chažvez Dižaz de Leožn, Miguel Angel,$d1962-) has an 053 "PQ7298.413.H3794" (... Mexico--Individual authors or works--2001-), used on the classed LC record 2013419084 (Obra reunida (1984-2009)). However, LC also has (unclassed, level-7) records by this author which appear to be literary works from 1988 (LCCN 89817408, Este lugar sin sur) and 1991 (LCCN 92174033; Vhala blues para saxofones). OCLC has 5 records by this author classed with "PQ7298.13.H383" (... Mexico--Individual authors or works--1961-2000). Should literary works by this author be classed in the number currently in the 053 in his NAR, or should PQ7298.13 be used? Does the 053 need to be updated to reflect that he started writing before 2001?
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