J. Christopher Haley · Manuel G. Bonilla · Richard F. Meyer · Warren E. Yeend · James J. Lienkaemper · William J. Perry
1983 оны 1-р сар · U.S. Government Printing Office
Электрон ном
14
Хуудас
Энэ электрон номын тухай
This history of placer mining of the gold deposits of east central Alaska, near the town of Circle, covers its development from 1893 to date and includes a summary of the regional geology and of the gravels of each creek.