Complex sentence: In 1977-1989, NOWA published approximately 300 books, consisting of both Polish and foreign literature, as well as modern history, with average circulation ranging from several hundred to several thousand per title.
Split into simpler sentences: In 1977-1989, NOWA published approximately 300 books, consisting of both Polish and foreign literature as well as modern history. Average circulation ranged from several hundred to several thousand per title.