@book{Swagman1988,
author="Charles F. Swagman",
title="Development and Change in Highland Yemen",
year="1988",
publisher="University of Utah Press",
address="Salt Lake City",
keyword0="Agriculture",
keyword1="Qat",
keyword2="Shibam (PDRY)",
keyword3="Tribes",
keyword4="YAR",
type="book"
}