Torthaí cuardaigh
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Petrographic characterization of coals of the Semirara formation in Maniguin Wells, Sibay basin, Mindoro-Panay area
Foilsithe / Cruthaithe 2004Tráchtas -
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Coal and energy the need to exploit the world's most abundant fossil fuel
Foilsithe / Cruthaithe 1978LEABHAR