Laboratories 197 Laboratory studies 2,164 Laboratory techniques 769 Lacustrine deposits 2,718 Lacustrine environment 2,538 Lacustrine features 362 Lacustrine sedimentation 246 Lake Agassiz 108 Lake bursts 164 Lake deposits 1,495 Lake effects 124 Lake ice 2,148 LAKE ICE 171 Lake-level changes 398 Lakes 2,631 Lake sediments 1,553 Lake water 763 Laminations 230 Land cover 1,084 Land development 160 Landform description 167 Landform evolution 1,822 Landforms 2,041 Land ice 570 Land management 556 Land reclamation 759 Landsat 486 LANDSAT 881 Landscape development 467 Landscapes 952 Landscape types 1,350 Landslides 942 Land use 814 Large panel buildings 147 Larvae 119 Laser methods 613 Lasers 871 Last glacial maximum 2,104 Late-glacial environment 204 Latent heat 259 Latitude 275 Latticed structures 114 Laurentide ice sheet 564 Lava 118 Lava flows 109 Law, international 134 Laws and regulations 653 Layered materials 213 Layers 341 Leaching 247 Lead 506 Leakage 154 Leaves 128 Legislation 752 Levels 118 Libraries 156 Lichenometry 139 Lichens 950 Lidar 547 Lidar methods 301 Light and darkness effects 111 Light effects 156 Light scattering 442 Light transmission 199 Lightweight concretes 141 Limestone 165 Limnology 2,024 Linings 178 Lipids 233 Liquefied gases 231 Liquid cooling 173 Liquid phase 205 Liquid phases 434 Liquid solid interfaces 459 Lithofacies 1,460 Lithology 799 Lithosphere 297 Lithostratigraphy 2,118 Litter 144 Littoral erosion 165 Littoral zone 200 Living taxa 1,419 Loading 1,258 Loads (forces) 1,261 Load tests 227 Loam 141 Loams 346 Loess 1,188 Logistics 1,439 Long range forecasting 374 Lower Cretaceous 156 Lower Holocene 446 Lower Paleozoic 127 Low temperature 537 Low temperature effects--On man 289 Low temperature research 747 Low temperature tests 1,124 LOW TEMPERATURE TESTS 189 Lubricants 166 Luminescence 308