1. Byrd Station glaciological data 1957-58;Anderson,1958
2. Stratigraphic studies in the snow and firn of the Greenland Ice Sheet, U.S.A.;Benson;SIPRE Research Report 70,1962
3. Comment on wave propagation in snow;Bohren;Applied Physics J.,1974
4. Crary, A.P. (1975), Personal communication.
5. Robinson, E.S. (1975), Personal communication.