@book{Serjeant1979,
author="Robert B. Serjeant",
title="Customary law documents as a source of history",
year="1979",
booktitle="Sources for the History of Arabia, part 2",
publisher="Riyad University Press",
edition="1",
address="Riyad",
pages="99-103",
keyword0="Aramawt",
keyword1="Customary",
keyword2="Law",
keyword3="Sana'a",
type="chapter"
}