<volume-series> Volume Series (in a citation)
This uncommon metadata element holds a series number of a journal volume for the very rare case where a single journal has multiple volumes with the same volume number.
<!ELEMENT volume-series (#PCDATA %volume-series-elements;)* >
NISO STS 1.0 Tag Suite Components—Including TBX-TML
Version of October 2017 (documentation updated February 2021)