’discrete’and ’continuous’survey

1∶250 000 regional geological survey

1∶50 000 regional geological survey

2002 National Nutrition and Health Survey

210Po survey

250000 Regional Geological Survey

250000 scale regional geological survey

3 point- 3 poles lead survey method

3 survey method

36-Item Short Form Health Survey

3-component seismic survey

3D borehole-surface resistivity survey

3D control survey network

3-D direct current survey

3D seismic survey

3D Seunic Survey

3D survey

3-D survey

3-D survey design

50 000 REGIONAL GEOLOGICAL SURVEY