Book Reviews. - E. Frese; Seeber; Rudolf Avenhaus; S. H. Tys; Klaus-Peter Kistner (Z. Oper. Research, 1984)

Book review. - Tomas Gal; Seeber; K. Ambrosi; J. Alscher; Helmut Krcmar; Ludwig Fahrmeir (Z. Oper. Research, 1985)