The Medes and Persians : Conquerors and diplomats.

von Collins, Robert
London : Cassell, 1974.
Umfang/Format: 176 S. Abb. ; 23 cm.

Before "the End": Hadrian's Wall in the 4th century and after.

von Collins, Robert
Veröffentlicht in Debating late antiquity in Britain AD 300-700. (June 2003 conference at York).
Oxford : Archaeopress, 2004.
Umfang/Format: 123-132 : Abb.

A history of modern Sudan

von Collins, Robert O., 1933-
Cambridge, UK ; New York : Cambridge University Press, 2012.
Umfang/Format: xxiii, 331 p. : ill., maps ; 23 cm.

Land beyond the rivers : the Southern Sudan, 1898 - 1918

von Collins, Robert O., 1933-
New Haven [et al.] : Yale Univ. Press, 1971.
Umfang/Format: XVI, 368 p.