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	1.	Biodiversity. 8.7 million: a new estimate for all the complex species on Earth. [electronic resource] by Strain, Daniel Producer: 20110907 In: Science (New York, N.Y.) vol. 333 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Invasive species. A foul problem. [electronic resource] by Strain, Daniel Producer: 20120525 In: Science (New York, N.Y.) vol. 336 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Invasive species. Researchers set course to blockade ballast invaders. [electronic resource] by Strain, Daniel Producer: 20120525 In: Science (New York, N.Y.) vol. 336 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	4.	International organizations. UNESCO science braces for a big squeeze. [electronic resource] by Strain, Daniel Producer: 20121101 In: Science (New York, N.Y.) vol. 334 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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