?url_ver=Z39.88-2004&rft_id=doi%3A10.1068%2Fa100593&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Philipov%2C+D.&rft.aulast=Philipov&rft.aufirst=D.&rft.issue=5&rft.volume=10&rft.date=May+1978&rft.issn=0308-518X&rft.atitle=Migration+and+Settlement+in+Bulgaria&rft.title=Environment+and+Planning+A&rft.pages=593-617&rft.genre=article