MARC 380 Form of work
MARC field 380 in the authority format contains the class or genre to which a work belongs. May be used to differentiate a work from another work with the same title. This field is repeatable.
ǂa Form of work
ǂ2 Source of term
Policy and formulation
Try to provide at least one term from the AAT documents by conditions of production hierarchy in addition to an appropriate genre. Note that "monographs" is in the <document genres for literary works> hierarchy, although it seems to fit better in the conditions of production hierarchy.
For bills of mortality
380 Bulletins. ǂ2 aat 380 Vital statistics records. ǂ2 aat