TY  - BOOK
AU  - Leamer, Edward E..
TI  - Specification Searches :Ad Hoc Inference with Nonexperimental Data / 
SN  - 0-471-01520-2
U1  - B28 
PY  - 1964///
CY  - New York : 
PB  - John Willey & Sons , 
KW  - Mathematics
ER  -