{"id":"000731133","type":"article","title":"Some thoughts on the nature of the demographic crisis of the second century B.C","publisher":"Brill","publisher-place":"Leiden ; Boston","pages":"167-181","container-title":"Crises and the Roman empire : proceedings of the Seventh Workshop of the International Network Impact of Empire, Nijmegen, June 20-24, 2006","author":[{"family":"Ligt","given":"L. de"}],"issued":{"raw":"2007"}}