Merrill, George P. <br/><br/>
The first one hundred years of American geology / 
by George P. Merrill. 
 - New York :  Hafner,  1969. 
 - xxi, 773 p. :  ill. ;  24cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--History.<br/>Geology--United States.<br/>Geologists--United States.