List of current specialized abstracting and indexing services / prep. by the International Federation for Documentation for the International Conference on Science Abstracting, Unesco House, Paris, 20 to 25 June, 1949, convened by the United Nations Educational, Scientific and Cultural Organization

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List of current specialized abstracting and indexing services / prep. by the International Federation for Documentation for the International Conference on Science Abstracting, Unesco House, Paris, 20 to 25 June, 1949, convened by the United Nations Educational, Scientific and Cultural Organization 
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List of current specialized abstracting and indexing services 
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