Sources list for DUCKWORTH:

Welch, K., Powell, A., & University of Wales. Institute of Classics 1998, London : Duckworth with the Classical Press of Wales.
Media and Propaganda in Times of War

Phillipps, L.M.. Works of Man. London: Duckworth, 1911.
Egyptian Architecture

Hapson, Norman. Life and Opinions of Maximilien Robespierre. London: Gerald Duckworth & Co., 1974.
Maximilien Robespierre

Piaget, J. (1970). Genetic epistemology. (E. Duckworth, Trans.). New York: Columbia University Press.
Learning Process Beliefs

Hodges, R., The Anglo-Saxon Achievement. (London: Duckworth, 1991).
Roman and Anglo-Saxon Archaeology