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Subject
- Geology1,088
- Real property654
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- Maps265
- Roads226
- Coal212
- Groundwater174
- Administrative and political divisions133
- Fire risk assessment124
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- Geomagnetism118
- Geology, Structural113
- Nautical charts109
- History105
- Magnetic anomalies105
- Geology, Stratigraphic88
- Residential real estate83
- Real estate development72
