books.google.ca - This robust and engaging travel narrative re-creates a remarkable adventure in the summer of 1935, when Frederica de Laguna, then in her late 20s, led a party of three other scientists down the rivers of the middle and lower Yukon valley, making a geological and archaeological reconnaissance. De Laguna...http://books.google.ca/books/about/Travels_Among_the_Dena.html?id=UK_s4nMIaucC&utm_source=gb-gplus-shareTravels Among the Dena
