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地质学报 1930
SOMENEWMETHODSINCOALPETROGRAPHYAbstract: Ⅰ.INTRODUCTION.ThemicroscopicalstudyofcoaleitherbythinsectionorbypolishedsectionhasformednowaspecialbranchofgeologicalsciencewhichiscalledinGermany"Kohlenpetrog(?)aphie."Thisnameisnotatallasatisfactoryoneas,sofarasIknow,ithasbeenfollowedneitherinAmericanorinEuropean
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