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	1.	Observations on the planned provision of nitrogen fertilizer for the world by Tinbergen, Jan Series: Netherlands economic institute Material type: Text; Format: print regular print ; Audience: General; Publication details: Leiden : H. E. Stenfert Kroese, 1956 Availability: No items available. Add to cart (remove)
	2.	Observations on the planned provision of nitrogen fertilizer for the world by Tinbergen, Jan Series: Netherlands economic institute Material type: Text; Format: print regular print ; Audience: General; Publication details: Leiden : H. E. Stenfert Kroese, 1956 Availability: Items available for loan: Biblioteca Pública de la UNLP (1). Place hold Add to cart (remove)

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