scholarly journals Functional group analysis in coal by sup 31 P nmr spectroscopy

1989 ◽  
Author(s):  
J Verkade
2020 ◽  
Author(s):  
Pelangi Eka Yuwita ◽  
Kusuma Wardhani Mas'udah ◽  
Sunaryono ◽  
Ahmad Taufiq

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