Grandparents play in the park (sketch) Štěpán Zavřel Original bibliographical reference Grossvater Thomas, by Štěpán Zavřel, Bohem Press, Zurich, 1984 Other editions Nonno Tommaso, text and illustrations by Štěpán Zavřel, translated by Mafra Gagliardi, Bohem Press Italia, Trieste, 2012 Technique china Measures 17 x 12,5 cm Year 1983