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Off-farm labour decisions by Ontario swine producers
- Off-farm labour decisions by Ontario swine producers / Alfons Weersink. -- Guelph : University of Guelph, 1991. -- Nestr. : 3 tab. -- (Working Papers Series 91/15. Department of Agric. econ. and business). ošípané * chov ošípaných * rozhodovanie
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