The earth and planetary sciences in science during the twentieth century

作者: D. H. Hall

DOI: 10.1007/BF02017573

关键词:

摘要: The earth and planetary sciences have shown remarkable changes during the present century. relative coverage of earth-planetary science in journalScience (from USA) was studied quantitatively at 5-year intervals for period 1900–1976. Similar data, but more widely spaced, (10-year intervals) were obtained from journalNature Great Britain) as corroboration.

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