Thema Subject Categories 1.3

Previous versions of Thema are still available 1.2 1.1 1.0.

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Notation Category heading Add Mod ?
3 Time period qualifiers
DO NOT USE “3” on individual books, but select qualifiers from section 3* as appropriate
3M c 1500 onwards to present day
3MP 20th century, c 1900 to c 1999
3MP-JP-S 1926 to 1989 (Japanese Showa period)
See also: 3MPB-JP-D 1926 to 1945 (Japanese pre-war Showa period), 3MPQ-JP-B 1945 to 1989 (Japanese post-war Showa period)
201910

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