It looks like the University of Alaska Fairbanks has put The Dictionary of Alaska Place Names online in pdf form.
Per the webpage:
"This is a PDF version of the publication by Donald J. Orth published as Geological Survey Professional Paper 567, 1967, reprinted in 1971"
http://library.uaf.edu/resources-dictio ... lace-names
This is the "Big Book" of Alaskan Place Names (1,092 pages). The original hard copy edition is out of print and original editions are costing several hundred dollars. A feast of Alaskan historical information.
Toponym Freaks rejoice!