Subject
Conservation biology
2
Photogrammetry
2
Photographic surveying
2
Aerial photogrammetry
1
Aerial photography
Biologie de la conservation
1
Biology
1
Cartography
1
Coal gasification
1
Coal liquefaction
1
Congresses
1
Conservation of Natural Resources
1
Ecosystem management
1
Environment
1
Handbooks, manuals, etc
1
Health aspects
1
Land use
1
Mine safety
1
Mineral industries
1
Mines and mineral resources
1
Mining
1
Mining engineering
1
Natuurbehoud
1
Photographic interpretation
1
Prospecting
1
Remote sensing
1
Society for Mining, Metallurgy, and Exploration (U.S.)
1