Spencer, Edgar Winston. <br/><br/>
Basic concepts of historical geology / 
With drawings by Elizabeth Humphris Spencer. 
 - New York :  Crowell,  c1962 
 - 504 p. :  ill.  ;  27 cm. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology<br/>Paleontology.
<br/><br/><label>Dewey Class. No.: </label>551.7  / SPB 1962