Harker, Alfred,  1859-1939 <br/><br/>
The natural history of igneous rocks / 
by Alfred Harker 
 - London :  Methuen,  1909 
 - xv, 384 p. :  ill., maps. ;  20 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocks, Igneous