TY  - BOOK
AU  - Leamer Edward E
TI  - Specification searches :  inferende with nonexperimental data   
T2  - Wiley series in probability and mathematical statistics
SN  - 047105202
U1  - B28, L8 
PY  - 1978///
CY  - New York
PB  - John Wiley        
KW  - Statistics
N1  - Bibliography p350-66; Appendix : p322-49
ER  -