Problems, exercises, etc English language 11 Grammar 8 Textbooks for foreign speakers 5 Mathematics 3 Study and teaching 3 Interpersonal communication 2 Mathematical analysis 2 Readers 2 Authorship 1 Bashfulness 1 Biochemistry 1 Case studies 1 Civilization 1 College readers 1 Conversation and phrase books 1 Diagnosis 1 Economics 1 Electric circuits 1 Foreign speakers 1 Grammar, Generative 1 Interpersonal relations 1 Language and languages 1 Map reading 1 Maps, Topographic 1 Mechanics, Analytic 1 Medicine 1 Mental illness 1 Minorities 1 Notebooks, sketchbooks, etc 1