Difference between revisions of "Paper coal"
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A flaky variety of [http://cameo.mfa.org/materials/fullrecord.asp?name=coal coal] or papyraceous [http://cameo.mfa.org/materials/fullrecord.asp?name=lignite lignite] of the tertiary period which splits into thin layers. | A flaky variety of [http://cameo.mfa.org/materials/fullrecord.asp?name=coal coal] or papyraceous [http://cameo.mfa.org/materials/fullrecord.asp?name=lignite lignite] of the tertiary period which splits into thin layers. | ||
| − | == | + | == Sources Checked for Data in Record == |
* E.J.LaBarre, ''Dictionary and Encyclopedia of Paper and Paper-making'', Swets & Zeitlinger, Amsterdam, 1969 | * E.J.LaBarre, ''Dictionary and Encyclopedia of Paper and Paper-making'', Swets & Zeitlinger, Amsterdam, 1969 | ||