Web information services at the University of South Africa Library: a work in progress
Artikel Jurnal
Science in progress
edited by Wallace R. Brode
Yale University Press, 1963
Buku Teks SO
Francon, M.
Progress in microscopy
Row, Peterson, 1961
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Bodley, John H.
Victims of progress
Mayfield Publishing, 1982
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Doren, Charles van
The idea of progress
Frederick A. Praeger , 1967
Buku Teks SO