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	1.	No cover image available Dynamics of business cycles a study in economic fluctuations by Tinbergen Jan Polak J J [Auth.] Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: London Routledge & Kegan Paul 1950 Availability: Items available for loan: ISI Library, Kolkata (2)Call number: 338.54 T587, ... Place hold Add to cart (remove)
	2.	No cover image available International economic system by Polak J J Material type: Text; Format: print ; Literary form: Not fiction Language: English Publication details: London George Allen & Unwin 1954 Availability: Items available for loan: ISI Library, Kolkata (2)Call number: 330.1 P762, ... Place hold Add to cart (remove)
	3.	No cover image available National income of the Netherlands Indies, 1921 - 1939 by Polak J J Material type: Text; Format: print ; Literary form: Not fiction Language: English Availability: Items available for loan: ISI Library, Kolkata (1)Call number: 339.391 P762. Place hold Add to cart (remove)

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