Generally, a descriptive access should be provided for all variant titles of a map series/set or a serial (11) and for all variant producers of a map series/set.

A commercial firm that prepared issues of a map serial for the item’s author or author/publisher is usually traced only if it prepared the work for a block of time of five years or more, or if it was responsible for the preparation repeatedly throughout the publication’s history.

Individuals who participated in the creation of a map serial in a secondary capacity are not usually traced unless they appear on a majority of the issues.

See also:

Collective Sets/Series/Serials