1961.
Map
JLC Title 245h
[cartographic material]
1975, 1979 printing.
Map
JLC Title 245h
[cartographic material]
1971.
Map
JLC Title 245h
[cartographic material]
1971.
Map
JLC Title 245h
[cartographic material]
1992.
Microform
JLC Title 245h
[microform]
Upper Yukon Environmental History tapes
Florence Weber, Alejandra Duk-Rodkin, and Rene Barendregt talk about the geological history of the upper Yukon River area, extent of glaciation a
Sound recording
JLC Title 245h
[sound recording].