ALASKA GLACIERS 



associated text. Titles of series are abbreviated in the 

 table as follows : ESC = E. S. Curtis, Seattle, Wash.; 

 USGS = U. S. Geological Survey, Gilbert; USBS = U. 

 S. Biological Survey, Merriam, 1899; CBC = Canadian 

 Boundary Commission, Ottawa, Canada. The Boundary 

 Commission photographs are mounted in an album of 

 many volumes, and the complete reference includes num- 

 ber, volume and page. A copy of this album is in the 

 library of the State Department at Washington. 



SOURCES OF PHOTOGRAPHIC MATERIAL USED IN 

 TEXT FIGURES. 



