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1by Interim Co-ordinating Committee on Medical and Biological Abstracting, 2nd, Paris, 1949, Woerdeman, M.W.programme and meeting document bibliotecaUNESCO
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2by Interim Co-ordinating Committee on Medical and Biological Abstracting, 2nd, Paris, 1949, Woerdeman, M.W.programme and meeting document bibliotecaUNESCO
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3by Interim Co-ordinating Committee on Medical and Biological Abstracting, 1st, Paris, 1948, Zhukova, I.M., Woerdeman, M.W.programme and meeting document bibliotecaUNESCO
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4by Interim Co-ordinating Committee on Medical and Biological Abstracting, 1st, Paris, 1948, Zhukova, I.M., Woerdeman, M.W.programme and meeting document bibliotecaUNESCO