Research 542
Discovery and exploration 528
Scientific expeditions 254
Geology 231
Periodicals 195
International status 148
History 137
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Congresses 100
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Environmental aspects 70
Meteorology 67
Ecology 63
Handbooks, manuals, etc 51
Geophysics 49
Glaciers 49
Oceanography 49
Tourism 48
Climate 47
Geology, Stratigraphic 47
Bibliography 46
Geomagnetism 45
Zoology 42
Birds 40
Sea ice 40
Earth sciences 39
Natural resources 38
Historic sites 37
Ice sheets 37
Marine biology 37
Australian 36
Environmental impact analysis 36
Environmental conditions 35
Equipment and supplies 33
Observations 33
Biology 32
Climatic changes 32
Law and legislation 32
Conservation of natural resources 30
Conservation and restoration 29
Measurement 29
Effect of human beings on 26
Marine resources conservation 26
Huts 25
Nature 25
Environmental monitoring 24
Environmental policy 24
Penguins 24
Pollution 24
Catalogs 23
Paleontology 23
Environmental law 22
Historic buildings 22
International Geophysical Year, 1957-1958 22
Aeronautics 21
International cooperation 21
Adélie penguin 20
Aeronautical charts 20
American 20
Borings 20
Mines and mineral resources 20
Nature conservation 20
Atmospheric physics 19
Cold weather conditions 19
Foreign relations 19
Geology, Structural 19
Laboratories 19
Marine ecology 19
Meteorites 19
Glaciology 18
Instruments 18
Krill 18
Mining law 18
Seals (Animals) 18
Antarctica 17
Classification 17
Drift 17
Marine sediments 17
Science 17
Survival skills 17
Aircraft accidents 16
Botany 16
Geodesy 16
Geomorphology 16
Juvenile literature 16
Management 16
Sediments (Geology) 16
Transportation 16
Voyages and travels 16
Employee orientation 15
Air 14
Core drilling 14
Employees 14