COAL BOARD INVESTS IN DRILLING

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来源：

NEW SCIENTIST | 1985年 / 107卷 / 1467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：27 / 27

页数：1

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