Columbia subject headings:
Harvard subject headings:
Bookkeeping--Italy--Siena--History--Sources.
Hospitals--Italy--Siena--History--Sources.
Spedale di Santa Maria della Scala (Siena, Italy)--History--Sources.
Princeton subject headings:
Accounting--Italy--Siena--History.
Spedale di Santa Maria della Scala (Siena, Italy)--Accounting--History.