The “24” in your search string likely refers to page 24 of the 1985 or 1991 edition, which often discusses the transition from oral to written composition or the definition of “literary genre” in medieval Romance contexts.
For instance, one significant passage often referenced around that page range is Varvaro’s assertion: “Le letterature romanze del Medioevo non sono la somma di letterature nazionali, ma un sistema organico di testi che trascende i confini politici.” (The Romance literatures of the Middle Ages are not the sum of national literatures, but an organic system of texts that transcends political borders). This statement encapsulates his systemic and comparatist vision. Alberto Varvaro Letterature Romanze Del Medioevo 24.pdf