A GEOLOGICAL MAP OF ETHIOPIA AND SOMALIA (1973) 1:2.000.000 and comment with a map of major landforms. By Giovanni Merla ... et al. Firenze 1979, VIII, 95 s., ill. & 2 kort i lomme, 34 cm, $ 60.-. Pergamon Press Ltd., Oxford. - Hansen, Kaj (Geografisk Tidsskrift, 1981)