Coasts 70 Coast changes 35 Shore protection 18 Congresses 15 History 13 Beach erosion 12 Coastal zone management 12 Geology 12 Description and travel 11 Land use 11 Planning 11 Voyages to the Pacific coast 7 Bibliography 6 Coastal engineering 6 Data processing 6 Geology, Stratigraphic 6 Geomorphology 6 Tourism 6 Ocean waves 5 Shorelines 5 Coastal ecology 4 Discovery and exploration 4 Gold discoveries 4 Hydrography 4 Landforms 4 Licenses 4 Marine resources 4 Politics and government 4 Radio stations 4 Recreational use 4