TY  - BOOK
AU  - Graham,John W.
TI  - Missing data: analysis and design 
T2  - Statistics for social and behavioral sciences
SN  - 9781461440178 (hbk.)
PY  - 2012///
CY  - New York, NY
PB  - Springer Science+Business Media
KW  - Missing observations (Statistics)
N1  - Includes bibliographical references
ER  -