Petit Calvo, C. 2022. CAVALLAR, Osvaldo; DEGENRING, Susanne y KISCHNER, Julius: A Grammar of Signs. Bartolo da Sassolerrato´s Tract on Insignia and Coats of Arms, Berkeley (Ca.), University of California -Robbins Collection (= Studies in Comparative Legal History), 1994; xv+20. Anuario de Historia del Derecho Español. 66 (nov. 2022).