Glaciers are made up of fallen snow that, over many years, compresses into large, thickened ice masses. Glaciers form when snow remains in one location long enough to transform into ice. What makes glaciers unique is their ability to move. Due to sheer mass, glaciers flow like very slow rivers. Some glaciers are as small as football fields, while others grow to be dozens or even hundreds of kilometers long.
Monographs and brochures
The Glaciers of Central Asia: A Disappearing Resource (2011) 
Papers
Regulatory and procedural guidelines and reference information