The previous page is sending you to https://books.google.com/books?hl=en&lr=lang_en&id=zWlpEAAAQBAJ&oi=fnd&pg=PA177&ots=59qb0fE9o3&sig=imdLyZFptOeSG9dOKciN9RsFQWU. If you do not want to visit that page, you can return to the previous page.