stack of six volumes from a "Diccionario Enciclopedico Quillet" encyclopedia set

stack of six volumes from a "Diccionario Enciclopedico Quillet" encyclopedia set. The spines are red and black with gold lettering. The volumes are numbered III, VI, V, IV, VII, and VIII. Volume III has the words "Comprender" and "Estucuru," volume VI has "Manila" and "Patelar," volume V has "Historiado" and "Mamifero," volume IV has "Estuche" and "Historia," volume VII has "Patelidos" and "Scheele," and volume VIII has "Scheer" and "Zywiec." Each volume is labeled "Grolier" on the bottom right.