kw.\*:("CRYPTOTHYRELLA")
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CRYPTOTHYRELLA (BRACHIOPODS) FROM THE BRASSFIELD LIMESTONE (LOWER SILURIAN) OF OHIO AND KENTUCKY.GAURI KL; BOUCOT AJ.1970; J. PALEONTOL.; USA; 1970(1), VOL. 44, NUM. 0001, P. 125 A 131Miscellaneous
LATE ORDOVICIAN AND EARLIEST SILURIAN MERISTELLID BRACHIOPODS IN SCANDINAVIA.SHEEHAN PM.1977; J. PALEONTOL.; U.S.A.; DA. 1977; VOL. 51; NO 1; PP. 23-43; H.T. 3; BIBL. 1 P. 1/2; 15 ILL.Article