World of learning : 1960-61 /

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World of learning : 1978-1979 /

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Opportunities for summer study in Latin America /

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Repertoire des scientifiques francais /

Subjects: “…1618 Directorios como asunto…”

Directory of scientific research organization in the union of scientific research organization in the union of south africa / by Masson, D. Ryle

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Ulrich's periodicals directory : a classified guide to current periodicals, foreing and domestic /

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Directory of officers and activities for 1961 /

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Ulrich's periodicals directory : a classified guide to a selected list of current periodicals, foreign and domestic : 1973-1974 /

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Ulrich's periodicals directory : a classified guide to current periodicals, foreign and domestic /

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Directory of japanese scientific periodicals : natural sciences, medical science and industry /

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Directorio de facultades de farmacia de América Latina y España /

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Ulrich's periodicals directory : a classified guide to a selected list of current periodicals, foreign and domestic /

Subjects: “…1618 Directorios como asunto…”

American men of science : a biographical directory /

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Directorio latinoamericano de matemáticas /

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Directorio de bases de datos en ciencia y tecnología en la argentina /

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Directorio de bases de datos en ciencia y tecnología en la argentina /

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Directory of international scientific organization /

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Instituciones científicas de Argentina = Scientific Institutions of Argentine /

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