Columbia subject headings:
Nicola, da Rocca (Chaplain)--Correspondence.
Nicola, da Rocca--Correspondence.
Harvard subject headings:
Nicola, a Rocca (Junior--Correspondence.
Nicola, da Rocca--Correspondence.
Princeton subject headings:
Italy, Southern--History--13th century.
Nicola, da Rocca
Nicola, da Rocca (Chaplain)