1836TH is a shelf tag for each course, which gives the course number, the author and title and factor if two or more instructors teach the same course but use different books. A required is a must for the course. A recommended book is one which the professor feels would be a and valuable addition. It is not a must; its purchase depends upon the student's interest. mended books will be on the text shelves during semester opening but will be desigas "recommended" and the shelf tag will be orange instead of white as it is for a required ool openings, to provide for changes in courses, text books are returnable WITH REDuring the free drop period. They are returnable for full value only if they are in NEW on. Do not write your name in a book if there is any question that you might change the and do not make notes in it. If you have written your name in the book or made any the book is a used book and you can be refunded only one-half the new retail price. the balance of the year, with the exception of the last two weeks of any semester, text in new condition are returnable with receipt up to 10 days after purchase. books are accepted for return during the last two weeks of any semester, regardless of purchase.