@book{Puin1984,
author="Gerd-Rüdiger Puin",
title="The Yemeni ihijrahi concept of tribal protection",
year="1984",
booktitle="Land Tenure and Social Transformation in the Middle East",
editor="Tarif Khalidi",
publisher="American University of Beirut",
address="Beirut",
pages="483-94",
keyword0="Hijrah",
keyword1="Weekly",
type="chapter"
}