Rosenbaum Paul R Observational studies - New York Springer 1995 - xiii,230p+14 illus - Springer series in statistics . Includes bibliographical references; Index 229-230p ISBN: 0387944826 (hbd) Standard No.: 4441 Source: Narosa, Textual Subjects--Topical Terms: Experimental designStatistics Dewey Class. No.: B288, N5