Watts, Arthur Simeon,  1876- <br/><br/>
The fire clays of Maryland, 
by Arthur S. Watts, H. G. Schurecht, Charles K. Swartz and George M. Hall.  With an introductory chapter by Edward B. Mathews. 
 - Baltimore,  The Johns Hopkins press,  1922. 
 - 270 p.  illus., IV pl., tables, diagrs.  26 cm. 
 - Maryland.  Geological survey, 1896-      Special publications.  Vol. XI, pt. 2 .
<br/><br/> Also published in Maryland.  Geological survey.  [Reort]  Vol. XI (1922) p. [289]-559. 
<br/><br/><label>LCCN: </label>gs 23000276  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fire-clay.<br/>Clay--Maryland.
<br/><br/><label>LC Class. No.: </label>TN942  / .W27