Silurian. 

 - Baltimore,  The Johns Hopkins press,  1923. 
 - 794 p.  illus., LXVII pl. (incl. fold. col. map; fold. col. diagr.) maps, tables.  26 cm. 
<br/><br/> At head of title: Maryland Geological survey. 
<br/><br/>Geologic relations and geographic distribution of the Silurian strata of Maryland, by C.K. Swartz.--Stratigraphic and paleontologic relations of the Silurian strata of Maryland, by C.K. Swartz.--Sections of the Rose Hill and McKenzie formations, by W.F. Prouty and C.K. Swartz.--Sections of the Wills Creek and Tonoloway formations, by C.K. Swartz.--Correlation of the Silurian formations of Maryland with those of other areas, by C.K. Swartz.--American Silurian formations, by E.O. Ulrich and R.S. Bassler.--Paleozoic ostracoda: their morphology, classification, and occurences, by E.O. Ulrich and R.S. Bassler.--Systematic paleontology of Silurian deposits, by C.K. Swartz, W.F. Prouty, E.O. Ulrich and R.S. Bassler. 
<br/><br/><label>LCCN: </label>gs 23000260  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Maryland.<br/>Paleontology--Maryland.<br/>Geology, Stratigraphic--Silurian.<br/>Paleontology--Silurian.
<br/><br/><label>LC Class. No.: </label>QE121  / .A215 vol. 8