“Tradition & Fornyelse – Aage Birck & Heidi Guthmann Birck” catalogue

 with preface  by H. O. Boysen, chairman of  Haderslev Kunstforening

 and Sven Jørn Andersen, director of  Kunstmuseet Trapholt,

ISBN 87-98 18 32-22,  Multi Mud – 1992.