A page in this case means the actual piece of paper, or front and back of a sheet of paper, which technically would be counted as two pages of text in the book. (archwaypublishing.com)
So may scraping or sanding the backing of sheet flooring during removal. (religion.blogs.cnn.com)
If you do not have a baking stone, you can use the back of a sheet pan, but do not preheat the pan. (101cookbooks.com)