TECHNOLOGICAL RESEARCH - UNITED-STATES LOSING ITS LEAD

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作者：

ALDHOUS, P

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来源：

NATURE | 1991年 / 352卷 / 6330期

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中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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页码：5 / 5

页数：1

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