5 Diseases and pests 3 Art, Islamic 3 English language 2 Forests and forestry 2 Fungi 2 Grammar 2 History 2 Language & Literature 2 Spruce 2 Trees 1 Adelges abietis 1 American Studies 1 American essays 1 American prose literature 1 Animal behavior 1 Area Studies 1 Art 1 Art & Art History 1 Autobiography 1 Business 1 Children's literature 1 Clinical psychology 1 Creative nonfiction, American 1 Diapheromera 1 Girders 1 Hemlock 1 Humanities 1 Insects 1 Local government 1 Manuscripts, Greek (Papyri)