6.295.1 Element information
6.295.2 RDA definition and scope
6.295.2.1 Details of a proportional relationship between a whole sheet in a printed or manuscript resource and the individual leaves that result if that sheet is left full, cut, or folded.
6.295.3 General rule
6.295.3.1 Record details of bibliographic format if considered important (see 18.104.22.168). For instructions on recording bibliographic format as part of a statement of full collation, see Note on extent of manifestation, 22.214.171.124.
Volume 1 is folio; volume 2 is 12mo