6.25.1 Element information
6.25.2 RDA definition and scope
184.108.40.206 An underlying physical material of a manifestation.
6.25.3 General rule
220.127.116.11 If none of the terms in the RDA vocabulary is appropriate, record another suitable term from a standardized vocabulary and indicate its source. Prefer the RBMS Controlled vocabularies: Paper terms for terms for specific types of paper.