Harbaugh, John W. <br/><br/>
Stratigraphy and geologic time 
/John W. Harbaugh 
 - Dubuque, Iowa  W. C. Brown Co  1968 
 - ix, 113 p. 
<br/><br/>   <br/>Includes references and index. 
<br/><br/><label>ISBN: </label>254789 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>551  / HAR