How black is really black Slavonian pig?

URN:NBN:SI:DOC-BIIYVUDG2013Budimir, KristinaMargeta, PolonaMargeta, Vladimirdocuments/doc/B/URN_NBN_SI_doc-BIIYVUDG_001.pdfdocuments/doc/B/URN_NBN_SI_doc-BIIYVUDG_001.txtarticlestr. 25-28suppl. 41854-4800271044352URN:NBN:SI:doc-BIIYVUDGengBiotehniška fakultetaActa agriculturae slovenica. SuplementInCbarvagenotippasmeprašičiHow black is really black Slavonian pig?