"Holstein heifers"@en . "Production records of 15 374 Holstein animals including pregnant heifers imported from several countries were analysed. The performance of imported heifers (a=5738) and their contemporaries (a=7967) was compared. The production of milk and protein of impo"@en . "1"^^ . . . "Book of Abstracts of the 50th Annual Meeting of the European Association for Animal Production" . . . "Efficiency of imported Holstein heifers" . "3"^^ . "RIV/00027014:_____/99:00008665!RIV/2004/MZE/M02004/N" . . "3"^^ . "0"^^ . . "0"^^ . . "Efficiency of imported Holstein heifers"@en . "Bou\u0161ka, Josef" . "[BECE05CB3224]" . "Z\u00FCrich" . "Wageningen Pers" . "Production records of 15 374 Holstein animals including pregnant heifers imported from several countries were analysed. The performance of imported heifers (a=5738) and their contemporaries (a=7967) was compared. The production of milk and protein of impo" . "RIV/00027014:_____/99:00008665" . "Wageningen" . . . . . . "739606" . "P(EP0960006320)" . "Urban, Franti\u0161ek" . "Efficiency of imported Holstein heifers" . "90-74134-73-4" . "Efficiency of imported Holstein heifers"@en . . "176" . . .