Clark, William Bullock <br/><br/>
Report on the physical features of Maryland, together with an account of the exhibits of Maryland mineral resources made by the Maryland Geological Survey 

 - Baltimore, MD  Johns Hopkins Press  1906 
 - 284 pages 
<br/><br/> illus., 30 plates 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>1. Geology - Maryland 2. Mines and mineral resources - Maryland