Dolnodunavskata otăranitelna sistema meždu Dortikum i Durostorum ot Avgust do Mavrikij : The defence system along the Lower Danube between Dorticum and Durostorum from Augustus to...

von Ivanov, Roumen Teofilov
Sofija : ALEA, 1999.
Umfang/Format: 366 S. : Abb. ; 8°.