@book{Schmidt1987, author="J├╝rgen Schmidt", title="The Sabaean irrigation economy of Marib", year="1987", booktitle="Yemen: 3000 Years of Art and Civilisation in Arabia Felix", editor="Werner Daum", publisher="Pinguin-Verlag", address="Innsbruck", pages="55-62", keyword0="Antiquity", keyword1="Irrigation", keyword2="Marib", type="chapter" }