Sand 14 Sand dunes 14 Sand, Foundry 6 Oil sands 5 Sand and gravel industry 5 Women novelists, French 5 Biography 4 Testing 4 Environmental aspects 3 Geology 3 History 3 History and criticism 3 Novelists, French 3 Reclamation of land 3 Shale oils 3 Women and literature 3 Bibliography 2 Calibration 2 Coast changes 2 Coastal plants 2 Correspondence 2 Criticism and interpretation 2 Gravel 2 Influence 2 Landforms 2 Liquid fuels 2 Meteorological instruments 2 Meteorology 2 Mines and mineral resources 2 Observations 2