Search U.S. government technical reports digitized or harvested by TRAIL.
Analyses of natural gases of the United States, 1962
Analyses of natural gases of the United States., 1961
Analyses of natural gases of the United States, 1964
Analyses of natural gases, 1981
Analyses of natural gases, 1982
Helium resources of the United States, 1981
Helium resources of the United States, 1983
Helium resources of the United States, 1985