245 Subfield $k - Form:

Subfield $k contains the form of the material. Specific kinds of materials are distinguished by an examination of their physical character, subject of their intellectual content, or the order of information within them (e.g., daybooks, diaries, directories, journals, memoranda, etc.).

Examples:

245 10$aFour years at Yale :$kdiaries,$f1903 Sept. 16-1907 Oct. 5.

245 00$aPL 17 Hearing Files$kCase Files$f1974$pDistrict 6$hmicrofilm (jacketted in fiche).

245 14$aThe charity ball :$ba comedy in four acts :$ktypescript,$f1889 /$cby David Belasco and Henry C. DeMille.