TY  - BOOK
AU  - Purington,Chester Wells
TI  - Methods and costs of gravel and placer mining in Alaska
T2  - U.S. Geological survey. Bulletin
AV  - QE75 .B9 no. 263
PY  - 1905///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Gold mines and mining
KW  - Alaska
N1  - Subject series: A, Economic geology, 55; "Notes on dredging, by J. P. Hutchins": p. 173-190; Includes index; Bibliography: p. 261-262
ER  -