?url_ver=Z39.88-2004&rft_id=https%3A%2F%2Fdx.doi.org%2F10.54203%2Fscil.2021.wvj63&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=R.+R.&rft.au=Sadek%2C+R.+R.&rft.aulast=Sadek&rft.title=World's+Veterinary+Journal&rft.date=25+September+2021&rft.volume=11&rft.pages=489-497&rft.issue=3&rft.issn=23224568+(ISSN)&rft.atitle=Evaluation+of+Milk+Yield+and+Reproductive+Performance+of+Pure+Holstein+and+Its+F1+Crossbreds+with+Montbeliarde+in+Egypt&rft.genre=article