Survey and opening up of a millitary road from Valdez to Copper Center, 1899

von Abercrombie, William Ralph
Veröffentlicht in Compilation of narratives of explorations in Alaska (1900)

A supplementary expedition into the Copper River Valley, 1884

von Abercrombie, William Ralph
Veröffentlicht in Compilation of narratives of explorations in Alaska (1900)

A millitary reconnoissance of the Copper river Valley, 1898

von Abercrombie, William Ralph
Veröffentlicht in Compilation of narratives of explorations in Alaska (1900)

Reports of explorations in the territory of Alaska (Cooks inlet, Sushitna, Copper, and Tanana rivers) 1898

Veröffentlicht 1899

Alaska. 1899 : Copper River exploring expedition

Veröffentlicht 1900