Becker, Cynthia S. Immigration and illegal aliens, burden or blessing? / Burden or blessing?. Cynthia S. Becker. - New York : Thomson/Gale, 2006. - ix, 182 p. : ill., maps ; 28 cm. ISBN: 9781414404202 Subjects--Topical Terms: Illegal aliens--United States. Subjects--Geographic Terms: United States--Emigration and immigration. Dewey Class. No.: 325.273