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    An observational analysis of twin births, calf sex ratio, and calf mortality in Holstein dairy cattle.

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    Silva Del Rio, N.; Stewart, Steven; Rapnicki, Paul; Chang, Y.M.; Fricke, Paul M.. (2005). An observational analysis of twin births, calf sex ratio, and calf mortality in Holstein dairy cattle.. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/109549
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