Pearson, Robert Carl,  1926- <br/><br/>
Eocene rocks in northeast Washington--radiometric ages and correlation :  the genetic relations among numerous patches of volcanic rocks / 
by R. C. Pearson and J. D. Obradovich 
 - Washington, D.C :  United States Government Printing Office,  1977 
 - iv, 41 p. :  ill., (1 fold. in pocket) ;  24 cm. 
 - Geological Survey bulletin ;  1433 .
<br/><br/>Bibliography: p. 32-34 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Eocene<br/>Potassium-argon dating<br/>Stratigraphic correlation--Washington (State)<br/>Stratigraphic correlation--British Columbia<br/>Geology--Washington (State)<br/>Geology--British Columbia--Surveys
<br/><br/><label>Dewey Class. No.: </label>551.78