Mothers argue (study) Štěpán Zavřel Original bibliographical reference Die Kinderbrücke, Max Bolliger, Štěpán Zavřel, Bohem Press, 1979 Other editions Il ponte dei bambini, text by Max Bolliger, illustrations by Štěpán Zavřel, translation by Francesca Romanini, Bohem Press Italia, Trieste, 2022 Technique collage and watercolor Measures 64,6 x 46,4 cm Year 1979