Kazner, E.; Schiefer, W.; Zlch, Klause Joachim, eds.; trans. by Margareta Lewke
Archaeological Institute of Great Britain and Ireland.
Topographic and Geological Survey Commission of Pennsylvania.
Harris, R. J. C., ed.
Story, William W.
Hatzfeld, E., ed.
Wendel, Friedrich
Thompson, Donald O. & Chimenti, Dale E. eds.
de Schweinitz, G. E.
Halstead, Bruce W.
Singh, S. P. & J.W.H. Burry & B. Watson, eds.
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