TY  - BOOK
AU  - Joreskog K G
AU  -  Wold H Ed.
TI  - Systems under indirect observation:  Causality stru   
T2  - Contributions to Economic Analysis. 139
U1  - B, M2 
PY  - 1982///
CY  - Amesterdam
PB  - North-Holland          
KW  - Mathematics
N1  - Bib P 271-85
ER  -