Poľnohospodárske výrobky. 2, Živočíšne výrobky / / František Burda . Bratislava :  Príroda , 1986 . 264 s . [6, of that borrowed 0]

67th Annual report 1993-94 : Agricultural research institute of Northern Ireland . Hillsborough :  Agric. Res. Inst. of Northern Ireland , 1994 . 51 s . ISBN 0-9513742-6-5 . [1, of that borrowed 0]