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@Article{Lilliu:1959:PCS, author = "Giovanni Lilliu", title = "The Proto-Castles of {Sardinia}", journal = j-SCI-AMER, volume = "201", number = "6", pages = "62--69", month = dec, year = "1959", CODEN = "SCAMAC", DOI = "https://doi.org/10.1038/scientificamerican1259-62", ISSN = "0036-8733 (print), 1946-7087 (electronic)", ISSN-L = "0036-8733", bibdate = "Sat May 18 16:00:36 MDT 2013", bibsource = "http://www.math.utah.edu/pub/tex/bib/sciam1950.bib", URL = "http://www.nature.com/scientificamerican/journal/v201/n6/pdf/scientificamerican1259-62.pdf", acknowledgement = ack-nhfb, fjournal = "Scientific American", journal-URL = "http://www.nature.com/scientificamerican", }