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  1.  18
    The length of Eratosthenes' stade.Donald Engels - 1985 - American Journal of Philology 106 (3):298.
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  2.  21
    Alexander's Intelligence System.Donald Engels - 1980 - Classical Quarterly 30 (02):327-.
    It has frequently been recognized that the collection and use of accurate military intelligence was of fundamental importance for the success of Alexander's campaigns. No intelligent strategic or tactical decision can be made by any commander without advance knowledge of an enemy's location, strength, his capabilities and weaknesses, and the geography of the projected campaign. However, an analysis of the procedures Alexander used to obtain and evaluate intelligence has never been undertaken. This neglect is probably the result of the scattered (...)
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    The Use of Historical Demography in Ancient History.Donald Engels - 1984 - Classical Quarterly 34 (02):386-.
    The purpose of this paper is to assess the validity of some methods currently being used to interpret the demographic evidence from the ancient world. For example, it has been claimed that during the Hellenistic and Roman eras, birth rates were 40/1,000/year, death rates 36/1,000/year, and that 10% of healthy infants were killed, raising the death rate to 40/1,000/year; the claims rest on comparative material and anecdotes from literary sources. This paper will question the use of comparative material from modern (...)
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