Characteristics of Common Landscape Features; Rocks and Trees, Open PDF Document Details Document Type Technical Report Publication Date Jan 01, 1987 Accession Number ADA298026 Entities People Harold L. Heller Tags Communities of Interest Air Platforms DTIC Thesaurus Topics California Central America Chemical Elements Earth Sciences Ecology Forests Geography Geology Habitats North America Plants Regions South America Temperate Regions Temperature Gradients United States Vegetation