By Bearden Birgitte   Petersen Leif   in Plant and Soil

ISSN:0032-079X|218|1-2|173-183

Springer Publishing Company ‎(2000)‎

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Siege Warfare and Military Organization in the Successor States (400-800 AD)‎

By Petersen   Leif Inge Ree  

ISBN:9789004254466

Brill‎(2013)‎

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By Charman Andrew JE   Petersen Leif M   Piper Laurence   in Development Southern Africa

ISSN:1470-3637|30|4-5|580-595

Routledge Ltd‎(2013)‎

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