Paperback. Exhibition catalog with black & white illustrations. Text in Spanish and English. 152 pp. 26,5 x 21 cm. Small bump to lower spine end and corners. Grup de Treball (1973-75) defended the social function of art through creative action and was one of Spain’s most important conceptual art collectives. This catalog was published as a result of the donation of the group’s documentary collection to MACBA and the subsequent cataloging and study of its work.