@book{Madelung1984,
author="Wilferd Madelung",
title="Land ownership and land tax in Northern Yemen and Najran: 3rd-4th/9th-10th century",
year="1984",
booktitle="Land Tenure and Social Transformation in the Middle East",
editor="Tarif Khalidi",
publisher="American University of Beirut",
address="Beirut",
pages="189-207",
keyword0="Tribes",
type="chapter"
}