"This collection was conceived primarily as an organized body of material to be used in classes in 16th century counterpoint."
Latin words.
With English translations of Latin texts.
"Originally published as 'Examples of Gregorian chant and works, by Orlandus Lassus, Giovanni Pierluigi Palestrina and Marc antonio Ingegneri for use in classes of counterpoint'."
Bibliography
"Sources, commentary, and translations": p. 294-303.