cnki reference book

integrates nearly 200 well-known publishing house nearly 4,000 reference books, including dictionaries, bilingual dictionaries, specialist dictionaries, encyclopedias, catalogs, tables, biographies, quotations, manuals, etc., Million entries, 700,000 pictures, all entries are written by professionals, covering philosophy, literature and art, social sciences, culture and education, natural sciences, engineering, medicine and other fields.