J. Christopher Haley · Manuel G. Bonilla · Richard F. Meyer · Warren E. Yeend · James J. Lienkaemper · William J. Perry
1983年1月 · U.S. Government Printing Office
电子书
14
页
关于此电子书
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.