Cockfield, William Egbert,  1890- <br/><br/>
Sixtymile and Ladue rivers area, Yukon, 
by W. E. Cockfield. 
 - Ottawa,  Thomas Mulvey, printer,  1921. 
 - 3 p. l., 60 p.  VI pl., fold. col. map, tables.  25 cm. 
 - Canada. Geological Survey. Memoir 123. no. 105, Geological series .
<br/><br/>Published also as thesis (Ph. D.) Princeton University, 1918. 
<br/><br/><label>LCCN: </label>gs 21000302  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Yukon.
<br/><br/><label>LC Class. No.: </label>QE185  / .A2 no. 123