Wright, Thomas L. <br/><br/>
Chemical data for flows and feeder dikes of the Yakima Basalt Subgroup, Columbia River Basalt Group, Washington, Oregon, and Idaho, and their bearing on a petrogenetic model / 
by Thomas L. Wright, Margaret Mangan and Donald A. Swanson 
 - Washington, D.C. :  United States Geological Survey,  1989 
 - iv, 71 p. :  ill. ;  28 cm. 
 - U.S. Geological Survey bulletin ;  1821 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Basalt--Analysis--Northwest, Pacific<br/>Petrogenesis--Northwest, Pacific
<br/><br/><label>Dewey Class. No.: </label>552.2609795