Early proterozoic geology of the Great Lakes region / 
edited by L.G. Medaris, Jr 
 - Boulder, Colo. :  Geological Society of America,  1983 
 - 141 p. :  ill. ;  29 cm. 
 - Geological Society of America: memoir ;  160 .
<br/><br/>Includes bibliographies 
<br/><br/><label>LCCN: </label>83-11509 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Precambrian--Addresses, essays, lectures<br/>Geology--Great Lakes Region--Addresses, essays, lectures