National Parks
National Monuments
National Historical Parks, Memorials, and Battlefields
National Recreation Areas, Seashores and Trails
Other Preserves and Protected Areas
... Hegelschen Philosophie (1852) Wissenschaft der logischen Idee (1858-59), with a supplement (Epilegomena, 1862) Hegels Naturphilosophie und die Bearbeitung derselben ...