TY  - BOOK
AU  - Cockfield,William Egbert
TI  - Sixtymile and Ladue rivers area, Yukon,
T2  - Canada. Geological Survey. Memoir 123. no. 105, Geological series
AV  - QE185 .A2 no. 123
PY  - 1921///
CY  - Ottawa
PB  - Thomas Mulvey, printer
KW  - Geology
KW  - Yukon
N1  - Published also as thesis (Ph. D.) Princeton University, 1918
ER  -