Gertrude Duby Blom (1901-1993) Mexico. Chiapas, c. 1950-1960. Two (2) vintage silver prints on Agfa paper. Stamp of the photographer on the back. Average size of the prints : 12,7 x 8,9 cmThe book is attached : Gertrude Duby Blom, Imágenes Lacandonas (Tezontle), Fondo de Cultura Económica, Mexico, 2003 . Gertrude Duby Blom (1901-1993) Mexico. Chiapas, c. 1950-1960. Two vintage gelatin silver prints on Agfa paper. Photographer's stamp on versos. Average size of the prints: 12.7 x 8.9 cm