TY  - BOOK
AU  - Tinbergen, Jan and Polak, J. J.
AU  - Polak, J. J. ; jt. auth.
TI  - Dynamics of business cycles; a study in economic fluctuations
U1  - 338.54 
PY  - 1950///
CY  - London
PB  - Routledge & Kegan Paul
ER  -