Allen, Arthur Thomas. <br/><br/>
Zonation of the Middle and Upper Ordovician strata in northwestern Georgia / 
by Arthur T. Allen and James G. Lester ... 
 - Altanta,  1957. 
 - 110 p.  23 cm. 
 - Georgia. Dept. of Mines, Mining and Geology. Bulletin  no. 66 .
 - Georgia.  Department of Mines, Mining and Geology.  Bulletin  no. 66. .
<br/><br/> One map in pocket in back of book. 
<br/><br/>"Selected references": p. [107] 
<br/><br/><label>LCCN: </label>gs 58000152  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Ordovician.<br/>Geology--Georgia.
<br/><br/><label>LC Class. No.: </label>QE101  / .A12 no. 66