RIVERA, Diego, (Mexican, 1866-1957): ''Dolores Olmedo'', Lithograph, full size with margins 24 1/2'' x 15'', pencil signed, dated 1930, numbered 66-100, silver metal frame, 27'' x 20''. Several minor spots of creasing, taped margins show residue, overall toning. Acquired from Ferdinand Roten Galleries, 1976. Est. $6000/8000**