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Language: English
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Classification: 360 - Social problems & services; associations
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Classification: 333 - Economics of land & energy
330 - Economics
3
333 - Economics of land & energy
360 - Social problems & services; associations
370 - Education
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
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140 - Specific philosophical schools
1
200 - Religion
1
320 - Political science
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
551 - Geology, hydrology & meteorology
1
600 - Technology
1
900 - History & geography
1
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