Articles and essays that rely in large part on a primary source, written or visual, have that information recorded in the category, Primary Document. The field in the Feminae record first lists one of the document types below. It then identifies the source, incuding location and identifying numbers. For example:

Author	Boyd, David Lorenzo and Ruth Mazo Karras
Title	Interrogation of a Male Transvestite Prostitute in Fourteenth-Century London
Source	GLQ: A Journal of Lesbian and Gay Studies 1, 4 (1995): 459-465.
Primary Document	Legal Document London, Corporation of London Records Office, Plea and Memoranda Roll A34, m. 2 (1395)

Amulet
Baptismal Record
Charter
Decorative Art
Episcopal Register
Financial Record
Genealogy
Glass Window
Government Document
Handbook
Household Account
Human Remains
Inscription on Stone
Jewelry
Legal Document
Letter
Manuscript
Manuscript Illumination
Marriage Contract
Monastic Document
Notarial Document
Notarial Register
Painting
Papyrus
Petition
Probate Register
Sculpture
Sister- Book
Tapestry
Visitation
Will