Geology 903
Mines and mineral resources 564
Alaska 312
Ore deposits 176
Geology, Stratigraphic 169
Forest management 162
Land titles Registration and transfer 133
Paleontology 133
Tongass National Forest (Alaska) 124
Gold mines and mining 99
Logging Environmental aspects 93
Geochemical prospecting 88
Alaska Description and travel 85
Earthquakes 83
National parks and reserves 76
Geochemistry 62
Geomagnetism 61
Petroleum 60
Public lands 60
Uranium ores 59
Glaciers 57
Water-supply 56
Petrology 55
National Petroleum Reserve (Alaska) 54
Land use 53
Volcanoes 53
Coal 52
Gold ores 50
Indian land transfers 50
Wildlife refuges 50
Forest reserves 46
Indians of North America Claims 45
Geology, Structural 43
Oil and gas leases 43
Water quality 43
Denali National Park and Preserve (Alaska) 42
Sediments (Geology) 41
Stream measurements 41
Arctic National Wildlife Refuge (Alaska) 40
Radioactive substances 40
Tongass National Forest (Alaska) Environmental conditions 38
Hydrology 37
Wildlife conservation 36
Alaska History 34
Petroleum Geology 34
Groundwater 33
Copper ores 32
Paleobotany 32
Climatic changes 31
Indians of North America 31
Placer deposits 31
Prospecting 30
Alaska Earthquake, Alaska, 1964 29
Hydroelectric power plants Law and legislation 29
Magnetic storms 28
Igneous rocks 27
Tin ores 27
Ammonoidea 26
Borings 26
Forest policy 26
Radioactive prospecting 26
Wilderness areas 26
Environmental monitoring 25
Fishery management 25
Foraminifera, Fossil 25
Engineering geology 24
Outdoor recreation 24
Environmental impact statements 23
Indians of North America Land tenure 23
Oil spills 23
Wrangell-Saint Elias National Park and Preserve (Alaska) 23
Geology, Economic 22
Katmai National Park and Preserve (Alaska) 22
Natural resources 22
Petroleum industry and trade Environmental aspects 22
Streamflow 22
Zinc ores 22
Chugach National Forest (Alaska) 21
Public lands Management 21
River sediments 21
World War, 1939-1945 Campaigns 21
Forest roads 20
Forests and forestry 20
Frozen ground 20
Klondike River Valley (Yukon) Gold discoveries 20
Micropaleontology 20
North Slope (Alaska) 20
Petroleum reserves 20
Wilderness areas Law and legislation 20
Coal mines and mining 19
Metamorphic rocks 19
Motor vehicles Recreational use 19
Nickel ores 19
Floods 18
Geology Research 18
Lead ores 18
Mineral industries 18
Eskimos 17
Gates of the Arctic National Park and Preserve (Alaska) 17
Glacier Bay National Park and Preserve (Alaska) 17