| Label | Dataset | Type | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | Coalbed methane drainage--Rotary drilling |
LC Subject Headings (LCSH) |
ComplexSubject ComplexType Authority |
sh88006754 | |
| 2. | Methane--Spectra |
LC Subject Headings (LCSH) |
ComplexSubject ComplexType Authority |
sh85084380 | |
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