TY  - BOOK
AU  -  Retherford, Robert D.
AU  -  Choe, Munja Kim.
TI  -  Statistical models for causal analysis
SN  -  0471558028
U1  -  519.535 RET 
PY  - 1993///
CY  -  New York
PB  -  John Wiley & Sons
KW  -  Multivariate analysis
N1  -  Includes bibliographical references (p. 251-253) and index
ER  -