Housni, El Arbi. Field operations of dual record tests in the CERED POPLAB / by El Arbi Housni. - Chapel Hill : International Program of Laboratories for Populatio n Statistics, 1975. - 41 p. : ill. ; 26 cm. - Scientific report series ; no. 21 . Bibliography: p. 27. Subjects--Topical Terms: Demographic surveys-- Morocco. Dewey Class. No.: 001.433 HOU