Diagonal Cero Nº. 23, Setiembre 1967
La Plata: Diagonal Cero, 1967. Die cut 19,7 x 24,2 cm (7.75 x 9.5") card stock folder printed in red and black ink containing seven unbound and twice-folded 17,5 x 22,8 cm (6.9 x 9") leaves, one of which has an added die cut and folded sheet. Text in Spanish.....