Materia medica, Vegetable 59 Genetics 57 History 41 Genes 38 Philosophy 35 Sociology 24 Economics 21 Medicinal plants 19 DNA 18 Economic growth and development-- Economic Planning 17 History and criticism 17 Genome 16 Recent progress in medicinal plants -- Indexes--- Medicinal plants -- Research -- Indexes-- Materia medica, Vegetable -- Research -- Indexes 15 Drugs (Materia medica)-- Pharmacology 14 Proteins 14 Psychology 14 Andy Davies 13 Bob Lewis 13 Bob Wilson 13 Botany 13 Botany, Medical 13 English literature 13 Fred Fawbert 13 Genetics-- Biology 13 Gerard O`Neil 13 John Stock 13 Melissa Towner 13 Peter Darnton 13 Peter Osborn 13 RNA 13