Grammar German language -- 32 English language -- 30 Study and teaching 16 Listening 13 Vocabularies 13 Reading 10 more ... German language 5 English 4 Textbooks for foreign speakers -- 4 Grammar -- 3 Writing 3 Japanese language -- 2 Pronunciation 2 Rhetoric 2 Spanish language -- 2 Verbs, problems, exercises, etc 2 Applicative grammar 1 Composition and exercises 1 Composition and exercises -- 1 Editing 1 Fhilipino language -- 1 Foreign speakers 1 Glossaries, vocabularies, etc 1 Language and languages -- 1 Philipino language 1 Philipino language -- 1 Problem, exercises, etc 1 Pronounciation 1 Self-instruction 1 less ...