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	1.	Secular trends in twinning rates. [electronic resource] by D'Addato, Agata V Producer: 20070313 In: Journal of biosocial science vol. 39 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Frequency of twin births in developed countries. [electronic resource] by Pison, Gilles D'Addato, Agata V Producer: 20060818 In: Twin research and human genetics : the official journal of the International Society for Twin Studies vol. 9 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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