52 The Lower Cretaceous Deposits of Maryland 



1891 

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Bull. Geol. Soc. Am., vol. ii, 1891, pp. 431-450, pi. xvi. 



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Williams, Geo. H. (Editor.) Geological Map of Baltimore and 

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, and Clark, Wm. B. Eeport on short excursions made by 



the Geological Department of the University during the autumn of 1891. 

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1892 

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1893 

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1894 

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Trans. Amer. Inst. Min. Eng., vol. xxiv, 1894, pp. 372-397, pis. 1 and 2. 



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