ERNI, HANS. Skizzenbuch. 4 erotic color lithographs by Erni, including two double-page plates, numerous hors-texte plates, plus an original signed pencil drawing by erni of a young couple in profile against a sun, on full half-title, dated 21/7/77. Oblong small folio, blue boards stamped in white; dust jacket. Zurich, 1971
