TY  - BOOK
AU  - Bry Gerhard
AU  -  Boschan Charlotte
TI  - Cyclical analysis of time series :  Selected proced   
T2  - National Bureau of Economic Research, Technical paper 20
SN  - 0870142232
U1  - X:74:D6,9(B), L1 
PY  - 1971///
CY  - New York
PB  - National Bureau of Economic Research USA    
KW  - Economics
ER  -