The coal-bearing group in the Nenana Coal Field, Alaska /
By Clyde Wahrhaftig ... [et al.].
-- Washington : United States Government Printing Office, 1969
- 30 p. --
(Geological Survey Bulletin ; 1274-D).
Fecha real de registro 02-06-1969
Alaska
Carbón
552.574(798)
Fecha real de registro 02-06-1969
Alaska
Carbón
552.574(798)