Columbia subject headings:
Agriculture--Remote sensing--Congresses.
Biotic communities--Remote sensing--Congresses.
Hydrology--Remote sensing--Congresses.
Oceanography--Remote sensing--Congresses.
Remote sensing--Congresses.
Harvard subject headings:
Princeton subject headings:
Agriculture--Remote sensing--Congresses.
Hydrology--Remote sensing--Congresses.
Ocean--Remote sensing--Congresses.
Remote sensing--Congresses.