Pig progress:  the international magazine on pig production, vol.30, no.8 (2014); vol.31, no.1-4, 10(2015); vol.32, no.4 (2016) 

 - [S.l]:  [s.n]  2016. 
<br/><br/><label>Dewey Class. No.: </label>636.405  / PIG