@misc{Steffen1979, author="Hans Steffen", title="Population Geography of the Yemen Arab Republic: The Major Findings of the Population and Housing Census of February 1975 and of Supplementary Demographic and Cartographic Surveys", year="1979", journal="Beihefte zum Tübinger Atlas der Vorderen Orients. Reihe B Nr.39", address="Wiesbden", keyword0="Census", keyword1="Education", keyword2="Geography", keyword3="Government", keyword4="History", keyword5="Literacy", keyword6="Manpower", keyword7="Physical", type="report" }