TY - BOOK AU - Snijders,T.A.B. AU - Bosker,R.J. TI - Multilevel analysis: an introduction to basic and advanced multilevel modeling SN - 9780761958901 U1 - 519.535 SNI PY - 1999/// CY - London, Thousand Oaks, Calif. PB - Sage Publications KW - Multivariate analysis N1 - Includes bibliographical references (p. 252-260) and index ER -