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ALASKA
Hydrology
Limnology and Potamology
3
*ENVIRONMENTAL IMPACT
2
*GROUND WATER
2
PERMAFROST
2
SUBSURFACE
2
TANANA FLATS
2
VEGETATION
2
WETLANDS
2
*AERIAL RECONNAISSANCE
1
*AIRBOATS
1
*ALASKA
1
*ATMOSPHERIC TEMPERATURE
1
*CRUDE OIL
1
*OIL SPILLS
1
*PERMAFROST
1
*WETLANDS
1
AIR CUSHION VEHICLES
1
ALKALINITY
1
ASPHALT
1
BLADDERWORT
1
BOATS
1
BOG
1
BUCK BEAN
1
CALCIUM
1
COLD REGIONS
1
DEGRADATION
1
ENVIRONMENTAL FATE
1
Ecology
1
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