@book{Birks1980,
author="John S. Birks and Clive A. Sinclair",
title="The Yemen Arab Republic (YAR)",
year="1980",
booktitle="Arab Manpower: The Crisis of Development",
publisher="St. Martin's Press",
address="New York",
pages="244-55",
keyword0="Manpower",
keyword1="Migration",
type="chapter"
}