Ziba, Philip. <br/><br/>
Sources of slate, slate querrying and manufacture of slate in the United Kingdom from the Middle Ages. 
 Sources of slate, slate querrying and manufacture . . . 

<br/><br/>Thesis (Ph.D.)--Architectural Assiciation, 1983. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slate industry -- Great Britain.--Slate industry -- Great Britain.<br/>Slate roofing -- Great Britain.--Slate roofing -- Great Britain.<br/>Geology -- Great Britain.--Geology -- Great Britain.