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	1.	[Prothrombin time: comparison of 4 thromboplastins of different origins and the use of plastic and glass material in its determination]. [electronic resource] by Porras, A A Esquivel, J M Trejos, A Varilly, J C Producer: 19860331 In: Sangre vol. 30 Availability: No items available. Save to lists Add to cart (remove)
	2.	Effect of the collection method on semen characteristics of Zebu and European type cattle in the tropics. [electronic resource] by León, H Porras, A A Galina, C S Navarro-Fierro, R Producer: 20091214 In: Theriogenology vol. 36 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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