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ANIMALS/VERTEBRATES
3
ANTARCTICA >
3
BIOLOGICAL CLASSIFICATION
CALL TYPE
3
CONTINENT >
3
EARTH SCIENCE
3
FIELD SURVEYS
3
GEOGRAPHIC REGION >
3
LEPTONYCHOTES WEDDELLII
MAMMALS
3
POLAR
3
WEDDELL SEALS
3
biota
oceans
3
AMD
2
AMD/AU
2
ANTARCTICA
2
BREATH
2
CEOS
2
DAVIS
2
HYDROPHONES
2
SEQUENCE
2
SONGS
2
TERRITORIAL DEFENCE
2
TIME
2
UNDERWATER VOCALISATIONS
2
CALLS
1
CONTACT CALLS
1
Davis
1
FREQUENCY
1
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