David Steinmetz,

Luther and Staupitz (Durham, NC, 1980).

David Steinmetz,

Luther in Context , 2nd edn. (Grand Rapids, MI, 2002).

Kenneth Strand (ed.),

Luther’s September Bible in Facsimile (Ann Arbor, MI, 1972).

Martin Treu, 'Lieber Herr Käthe’ - Katharina von Bora, die Lutherin , Catalogue for the 1999 Exhibition in the Lutherhalle (Wittenberg, 1999).

Martin Treu,

Katharina von Bora , 3rd edn. (Wittenberg, 1999).

Elizabeth Vandiver, Ralph Keen, and Thomas D. Frazel,

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