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Esler, S.L.; Nelson, M.L.: Evolution of scientific and technical information distribution (1998)
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Nelson, M.L.; Harrison, T.L.; Rocker, J.A.: OAI and NASA's scientific and technical information (2003)
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Van de Sompel, H.; Nelson, M.L.; Lagoze, C.; Warner, S.: Resource harvesting within the OAI-PMH framework (2004)
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