Feld, C. (1969). Picasso: His recent drawings, 1966-1968. Harry N. Abrams.
Chicago-čujuhus (17. p.)Feld, Charles. Picasso: His Recent Drawings, 1966-1968. Nueva York: Harry N. Abrams, 1969.
MLA-čujuhus (9. p.)Feld, Charles. Picasso: His Recent Drawings, 1966-1968. Harry N. Abrams, 1969.
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