4.3.1.1 Type of variant title for serial title
[type of data: composed data—controlled terms; repeatable] Choose a term from the following list of types of variant title if possible. Choose the most specific term, if possible. If none of these terms apply, compose a term to describe the type of variant title. If the type of title is ambiguous, do not include a term:
abbreviated title
added title page title
caption title
cover title
distinctive title
key title
parallel title
portion of title
running title
spine title
translation of title by cataloging agency