**DRAFT IN PROGRESS**
Early Works to 1800
Subject Heading Manual H1576 - "The subdivision -Early works to 1800 and similar subdivisions used under subjects are useful in subject cataloging because (a) they collocate early texts on a subject in the file under the subject, and (b) they separate from the general works (that is, the unsubdivided headings) materials that would normally be regarded as irrelevant by the average catalog user interested in current materials."
General rule
Applicable categories
Exceptions